- fixed a bug where signature table update fails when signature panel was collapsed

- improved "toggle height" click observer for information panels
- updated "Sortable" JS library `1.3.0` -> '1.6.0'

js/app.js

@@ -55,7 +55,7 @@ requirejs.config({
         bootstrapConfirmation: 'lib/bootstrap-confirmation',            // v1.0.5 Bootstrap extension for inline confirm dialog - https://github.com/tavicu/bs-confirmation
         bootstrapToggle: 'lib/bootstrap2-toggle.min',                   // v2.2.0 Bootstrap Toggle (Checkbox) - http://www.bootstraptoggle.com
         lazyload: 'lib/jquery.lazyload.min',                            // v1.9.5 LazyLoader images - http://www.appelsiini.net/projects/lazyload
-        sortable: 'lib/sortable.min',                                   // v1.3.0 Sortable - drag&drop reorder
+        sortable: 'lib/sortable.min',                                   // v1.6.0 Sortable - drag&drop reorder - https://github.com/rubaxa/Sortable
 
         // header animation
         easePack: 'lib/EasePack.min',

public/js/v1.3.1/app.js

@@ -55,7 +55,7 @@ requirejs.config({
         bootstrapConfirmation: 'lib/bootstrap-confirmation',            // v1.0.5 Bootstrap extension for inline confirm dialog - https://github.com/tavicu/bs-confirmation
         bootstrapToggle: 'lib/bootstrap2-toggle.min',                   // v2.2.0 Bootstrap Toggle (Checkbox) - http://www.bootstraptoggle.com
         lazyload: 'lib/jquery.lazyload.min',                            // v1.9.5 LazyLoader images - http://www.appelsiini.net/projects/lazyload
-        sortable: 'lib/sortable.min',                                   // v1.3.0 Sortable - drag&drop reorder
+        sortable: 'lib/sortable.min',                                   // v1.6.0 Sortable - drag&drop reorder - https://github.com/rubaxa/Sortable
 
         // header animation
         easePack: 'lib/EasePack.min',

public/js/v1.3.1/app/module_map.js

@@ -415,7 +415,7 @@ define([
         });
 
         // toggle height for a module
-        $(document).off('click.toggleModuleHeight').on('click.toggleModuleHeight', '.' + config.moduleClass, function(e){
+        contentStructure.on('click.toggleModuleHeight', '.' + config.moduleClass, function(e){
             let moduleElement = $(this);
             // get click position
             let posX = moduleElement.offset().left;
@@ -441,7 +441,7 @@ define([
                         easing: 'easeOutSine',
                         complete: function(){
                             moduleElement.removeClass( config.moduleClosedClass );
-                            moduleElement.removeData();
+                            moduleElement.removeData('origHeight');
                         }
                     });
                 }else{

sass/layout/_main.scss

@@ -1284,6 +1284,8 @@ code .fa {
 
 // drag&drop (Sortable) ===========================================================================
 .pf-sortable-ghost{
+  will-change: opacity;
+  transition: opacity 0.2s ease-out;
   opacity: 0.7 !important;
 
   .pf-module-handler-drag{