Release 1.18.3 (#3204)

* fix truncated comments for customer, project and activity
* fix export button label for non-translated renderer
* fixed avatar size if image or SVG is used
* filter timesheets by billable state in API

assets/sass/sidebar.scss

@@ -5,28 +5,6 @@
  * file that was distributed with this source code.
  */
 
-/* UserPanel is deactivated right now */
-/*
-.user-panel>.info {
-    left: 80px;
-}
-*/
-
-/* Right sidebar with additional tabs for personal settings and "About Kimai" section */
-/*
-.control-sidebar {
-    select {
-        color: $input-color;
-        background-color: $input-bg;
-    }
-    div.image {
-        img.img-circle {
-            max-width: 34px;
-        }
-    }
-}
-*/
-
 @media (min-width: $screen-sm-min) {
     .sidebar-mini.sidebar-collapse .sidebar-menu li.header {
         border-top-width: 1px;
@@ -39,13 +17,3 @@
         }
     }
 }
-
-/* 
-Simplify focus detection, when using keyboard tab navigation
-Deactivated, as it looks weird when the link is clicked 
-*/
-/*
-.sidebar-menu > li > a:focus {
-    text-decoration: underline;
-}
-*/