Merge pull request #2887 from bhldev/editorListIndentOutdent

Editor List Fix for 2844 and 2812

src/static/js/ace2_inner.js

@@ -5365,6 +5365,12 @@ function Ace2Inner(){
         level = Number(listType[2]);
       }
       var t = getLineListType(n);
+
+      // if already a list, deindent
+      if (allLinesAreList && level != 1) { level = level - 1;  }
+      // if already indented, then add a level of indentation to the list
+      else if (t && !allLinesAreList) { level = level + 1; }
+
       mods.push([n, allLinesAreList ? 'indent' + level : (t ? type + level : type + '1')]);
     }