Add selection element to theads as well as tbodies (#7238)

program/js/app.js

@@ -8350,11 +8350,15 @@ function rcube_webmail()
           if (repl[c].className) cell.className = repl[c].className;
           tr.appendChild(cell);
         }
+
+        if (list.checkbox_selection)
+          list.insert_checkbox(tr, 'thead');
+
         thead.appendChild(tr);
       }
 
       for (n=0, len=this.env.listcols.length; n<len; n++) {
-        col = this.env.listcols[n];
+        col = this.env.listcols[list.checkbox_selection ? n-1 : n];
         if ((cell = thead.rows[0].cells[n]) && (col == 'from' || col == 'to' || col == 'fromto')) {
           $(cell).attr('rel', col).find('span,a').text(this.get_label(col == 'fromto' ? smart_col : col));
         }

program/js/list.js

@@ -454,10 +454,10 @@ update_row: function(id, cols, newid, select)
 /**
  * Add selection checkbox to the list record
  */
-insert_checkbox: function(row)
+insert_checkbox: function(row, tag_name)
 {
   var key, self = this,
-    cell = document.createElement(this.col_tagname()),
+    cell = document.createElement(this.col_tagname(tag_name)),
     chbox = document.createElement('input');
 
   chbox.type = 'checkbox';
@@ -494,14 +494,26 @@ enable_checkbox_selection: function()
   this.checkbox_selection = true;
 
   // Add checkbox to existing records if any
-  var r, len, cell, row_tag = this.row_tagname().toUpperCase(),
-    rows = this.tbody.childNodes;
+  var r, len, cell, rows,
+    row_tag = this.row_tagname().toUpperCase();
 
+  if (this.thead) {
+    rows = this.thead.childNodes;
+    for (r=0, len=rows.length; r<len; r++) {
+      if (rows[r].nodeName == row_tag && (cell = rows[r].firstChild)) {
+        if (cell.className == 'selection')
+          break;
+        this.insert_checkbox(rows[r], 'thead');
+      }
+    }
+  }
+
+  rows = this.tbody.childNodes;
   for (r=0, len=rows.length; r<len; r++) {
     if (rows[r].nodeName == row_tag && (cell = rows[r].firstChild)) {
       if (cell.className == 'selection')
         break;
-      this.insert_checkbox(rows[r]);
+      this.insert_checkbox(rows[r], 'tbody');
     }
   }
 },
@@ -1014,10 +1026,10 @@ row_tagname: function()
   return row_tagnames[this.tagname] || row_tagnames['*'];
 },
 
-col_tagname: function()
+col_tagname: function(tagname)
 {
-  var col_tagnames = { table:'td', '*':'span' };
-  return col_tagnames[this.tagname] || col_tagnames['*'];
+  var col_tagnames = { table:'td', thead:'th', tbody:'td', '*':'span' };
+  return col_tagnames[tagname || this.tagname] || col_tagnames['*'];
 },
 
 get_cell: function(row, index)