* fix kanban drop rules not work.

module/execution/js/kanban.js

@@ -1197,7 +1197,7 @@ function initKanban($kanban)
         onRenderLaneName:  renderLaneName,
         onRenderHeaderCol: renderHeaderCol,
         onRenderCount:     renderCount,
-        droppable:         groupBy == 'default' ? {target: findDropColumns, finish:handleFinishDrop, mouseButton: 'left'} : false,
+        droppable:         groupBy == 'default' ? {target: findDropColumns, finish:handleFinishDrop} : false,
     });
 
     $kanban.on('click', '.action-cancel', hideKanbanAction);
@@ -1493,28 +1493,28 @@ function calcColHeight(col, lane, colCards, colHeight, kanban)
          regionCount += 1;
          if(regionCount > 1) return false;
      }
- 
+
      var regionID   = Object.keys(regions)[0];
      var region     = regions[regionID].groups;
      var groupCount = 0;
- 
+
      if($.isEmptyObject(region)) return false;
      for(var j in region)
      {
          groupCount += 1;
          if(groupCount > 1) return false;
      }
- 
+
      var group     = region[0];
      var laneCount = 0;
- 
+
      if($.isEmptyObject(group.lanes)) return false;
      for(var h in group.lanes)
      {
          laneCount += 1;
          if(laneCount > 1) return false;
      }
- 
+
      var regionHeaderHeight = $('.region-header').outerHeight();
      if(fold == 'open')
      {
@@ -1526,7 +1526,7 @@ function calcColHeight(col, lane, colCards, colHeight, kanban)
          var height        = windowHeight - (parseInt(mainPadding) * 2) - (parseInt(bodyPadding) * 2) - headerHeight - (parseInt(panelBorder) * 2);
          var regionPadding = $('.kanban').css('padding-bottom');
          var columnHeight  = $('.kanban-header').outerHeight();
- 
+
          $('.region').css('height', height);
          $('.kanban-lane').css('height', height - regionHeaderHeight - parseInt(regionPadding) - columnHeight);
      }

module/execution/js/taskkanban.js

@@ -1013,8 +1013,7 @@ $(function()
         droppable:
         {
             target:       findDropColumns,
-            finish:       handleFinishDrop,
-            mouseButton: 'left'
+            finish:       handleFinishDrop
         },
         onRenderHeaderCol: renderHeaderCol,
         onRenderLaneName:  renderLaneName,

module/kanban/js/view.js

@@ -1252,8 +1252,7 @@ function initKanban($kanban)
         droppable:
         {
             target:       findDropColumns,
-            finish:       handleFinishDrop,
-            mouseButton: 'left'
+            finish:       handleFinishDrop
         },
     });
 

module/productplan/js/browse.js

@@ -67,8 +67,7 @@ $(function()
             droppable:
             {
                 target:      findDropColumns,
-                finish:      handleFinishDrop,
-                mouseButton: 'left'
+                finish:      handleFinishDrop
             }
         });
 

module/project/js/kanban.js

@@ -208,8 +208,7 @@ $(function()
             {
                 selector:     '.kanban-card:not(.execution-item)',
                 target:       findDropColumns,
-                finish:       handleFinishDrop,
-                mouseButton: 'left'
+                finish:       handleFinishDrop
             },
         });
     });