[Code style] Cleaned out comments

open #250
open #274
scss, html scoured for commented
dead code, leftover TO-DOs and
other unnecessary comments;

platform/features/imagery/res/templates/imagery.html

@@ -1,5 +1,4 @@
 <div class="t-imagery" ng-controller="ImageryController as imagery">
-    <!-- Main image -->
     <div
         class="l-image-main-wrapper"
         ng-mouseenter="showLocalControls = true;"