Fix active rendering

Signed-off-by: Julius Härtl <jus@bitgrid.net>

css/viewer/odfviewer.css

@@ -56,13 +56,13 @@
   opacity: 0.8;
 }
 
+#versionsTabView li {
+  padding-left: 15px;
+  margin-left: -15px;
+}
 
 #versionsTabView li.active {
-  border-left: 3px solid var(--color-primary);
-  margin-left: -15px;
+  border-left: 3px solid var(--color-primary, #000);
   padding-left: 12px;
 }
-#versionsTabView li.active .revertVersion {
-  margin-right: -25px;
-}