Add Features: allowing lists to be sorted by modifiedAt when not in draggable mode.

Bug Fix #2093: the broken should be prior to file attachment feature introduced, and tested export board is working.

Thanks to whowillcare !

( xet7 merged this pull request manually from https://github.com/wekan/wekan/pull/2756 )

Closes #2093

client/components/boards/boardHeader.jade

@@ -77,6 +77,10 @@ template(name="boardHeaderBar")
             i.fa.fa-archive
             span {{_ 'archives'}}
 
+      if showSort
+       a.board-header-btn.js-open-sort-view(title="{{_ 'sort-desc'}}")
+        i.fa(class="{{directionClass}}")
+        span {{_ 'sort'}}{{_ listSortShortDesc}}
       a.board-header-btn.js-open-filter-view(
           title="{{#if Filter.isActive}}{{_ 'filter-on-desc'}}{{else}}{{_ 'filter'}}{{/if}}"
           class="{{#if Filter.isActive}}emphasis{{/if}}")
@@ -194,6 +198,20 @@ template(name="createBoard")
       | /
       a.js-board-template {{_ 'template'}}
 
+template(name="listsortPopup")
+  h2
+   | {{_ 'list-sort-by'}}
+  hr
+  ul.pop-over-list
+    each value in allowedSortValues
+     li
+      a.js-sort-by(name="{{value.name}}")
+        if $eq sortby value.name
+           i(class="fa {{Direction}}") 
+        | {{_ value.label }}{{_ value.shortLabel}}
+        if $eq sortby value.name
+           i(class="fa fa-check")
+
 template(name="boardChangeTitlePopup")
   form
     label