Update styles and add task priority feature

- Changed border color from #eee to #cdcdcd in various CSS files including dropzone, mapplic, summernote, grid, and select2 to enhance UI consistency.
- Added a new task priority selection feature in the task popup, allowing users to change the priority of tasks dynamically via AJAX.
- Implemented AJAX functionality to handle task priority changes and update the task list accordingly.

libraries/framework/skin/default_skin/css/theme.css

@@ -6316,7 +6316,7 @@ body.mfp-bg-open .ui-datepicker-inline {
   background: #FFF;
   border-radius: 1px;
   padding: 4px 12px;
-  border: 1px solid #EEE;
+  border: 1px solid #cdcdcd;
   margin-bottom: 6px;
 }
 
@@ -6876,7 +6876,7 @@ table.fancytree-ext-columnview tbody tr #preview {
   color: #AAA;
   font-weight: 500;
   background-color: #fff;
-  border: 1px solid #eee;
+  border: 1px solid #cdcdcd;
   padding: .5em .7em .6em;
 }
 
@@ -9401,7 +9401,7 @@ body.panel-fullscreen-active #content_wrapper {
   overflow: hidden;
   background: #F4F4F4;
   border-radius: 2px;
-  border: 1px solid #EEE;
+  border: 1px solid #cdcdcd;
 }
 
 .panel.mobile-controls .panel-heading>.panel-controls:hover,
@@ -10061,7 +10061,7 @@ hr {
   margin-top: 19px;
   margin-bottom: 19px;
   border: 0;
-  border-top: 1px solid #eeeeee;
+  border-top: 1px solid #cdcdcdeee;
 }
 
 .sr-only {
@@ -11857,13 +11857,13 @@ th {
   padding: 9px;
   line-height: 1.49;
   vertical-align: middle;
-  border-top: 1px solid #eeeeee;
+  border-top: 1px solid #cdcdcdeee;
 }
 
 .table>thead>tr>th {
   font-weight: 600;
   vertical-align: bottom;
-  border-bottom: 1px solid #eeeeee;
+  border-bottom: 1px solid #cdcdcdeee;
 }
 
 .table>caption+thead>tr:first-child>th,
@@ -11898,7 +11898,7 @@ th {
 }
 
 .table-bordered {
-  border: 1px solid #eeeeee;
+  border: 1px solid #cdcdcdeee;
 }
 
 .table-bordered>thead>tr>th,
@@ -11907,7 +11907,7 @@ th {
 .table-bordered>thead>tr>td,
 .table-bordered>tbody>tr>td,
 .table-bordered>tfoot>tr>td {
-  border: 1px solid #eeeeee;
+  border: 1px solid #cdcdcdeee;
 }
 
 .table-bordered>thead>tr>th,
@@ -11978,7 +11978,7 @@ table th[class*="col-"] {
     overflow-y: hidden;
     overflow-x: auto;
     -ms-overflow-style: -ms-autohiding-scrollbar;
-    border: 1px solid #eeeeee;
+    border: 1px solid #cdcdcdeee;
     -webkit-overflow-scrolling: touch;
   }
 
@@ -12938,7 +12938,7 @@ input[type="button"].btn-block {
   text-decoration: none;
   background-color: #fbfbfb;
   border-radius: 1px;
-  border: 1px solid #EEE;
+  border: 1px solid #cdcdcd;
   border-left: 4px solid #EEE;
   -webkit-transition: opacity 0.1s ease;
   transition: opacity 0.1s ease;
@@ -15745,7 +15745,7 @@ a.list-group-item:focus {
 
 .panel>.panel-body+.table,
 .panel>.panel-body+.table-responsive {
-  border-top: 1px solid #eeeeee;
+  border-top: 1px solid #cdcdcdeee;
 }
 
 .panel>.table>tbody:first-child>tr:first-child th,
@@ -15889,7 +15889,7 @@ a.list-group-item:focus {
 }
 
 .panel-group .panel-footer+.panel-collapse .panel-body {
-  border-bottom: 1px solid #eeeeee;
+  border-bottom: 1px solid #cdcdcdeee;
 }
 
 /*==================================================
@@ -19007,7 +19007,7 @@ ol.timeline-list li.timeline-item .timeline-date {
 .list-divide-items li+li {
   margin-top: 13px;
   padding-top: 13px;
-  border-top: 1px solid #EEE;
+  border-top: 1px solid #cdcdcd;
 }
 
 /*===================================================
@@ -20432,23 +20432,23 @@ ol.timeline-list li.timeline-item .timeline-date {
 
 /* Default Borders */
 .br-a {
-  border: 1px solid #eeeeee !important;
+  border: 1px solid #cdcdcdeee !important;
 }
 
 .br-l {
-  border-left: 1px solid #eeeeee !important;
+  border-left: 1px solid #cdcdcdeee !important;
 }
 
 .br-r {
-  border-right: 1px solid #eeeeee !important;
+  border-right: 1px solid #cdcdcdeee !important;
 }
 
 .br-t {
-  border-top: 1px solid #eeeeee !important;
+  border-top: 1px solid #cdcdcdeee !important;
 }
 
 .br-b {
-  border-bottom: 1px solid #eeeeee !important;
+  border-bottom: 1px solid #cdcdcdeee !important;
 }
 
 /* Border Style */
@@ -21583,7 +21583,7 @@ body.sidebar-collapsed #sidebar:before {
 }
 
 .navbar .media-list>li.media+li.media {
-  border-top: 1px solid #EEE;
+  border-top: 1px solid #cdcdcd;
 }
 
 .navbar .media-list>li.media>a {
@@ -25160,7 +25160,7 @@ body.calendar-page .tray-center .fc-toolbar .fc-center h2 {
 body.messages-page .message-menu {
   padding: 10px 15px;
   background-color: #FFF;
-  border-bottom: 1px solid #EEE;
+  border-bottom: 1px solid #cdcdcd;
 }
 
 body.messages-page .compose-btn {
@@ -25250,7 +25250,7 @@ body.messages-page .dockmodal-body .quick-compose-form {
 
 body.messages-page .dockmodal-body .quick-compose-form input.form-control {
   border: 0;
-  border-bottom: 1px solid #EEE;
+  border-bottom: 1px solid #cdcdcd;
 }
 
 body.messages-page .dockmodal-body .quick-compose-form .note-editor .note-editable {
@@ -25474,8 +25474,8 @@ body.invoice-page #invoice-summary tbody tr td:first-child {
 
 body.invoice-page #invoice-summary tbody tr:last-child td {
   background: #fafafa;
-  border-top: 1px solid #EEE;
-  border-bottom: 1px solid #EEE;
+  border-top: 1px solid #cdcdcd;
+  border-bottom: 1px solid #cdcdcd;
   height: 24px;
   line-height: 24px;
 }
@@ -25837,7 +25837,7 @@ body.error-page .mid-content input {
   padding: 10px 20px;
   border: 0;
   font-size: 16px;
-  border: 1px solid #EEE;
+  border: 1px solid #cdcdcd;
   border-left: 5px solid #4a89dc;
   background: #FBFBFB;
 }