fixed bad zIndex for modals (which were not visible)

Signed-off-by: fnuesse <felix.nuesse@t-online.de>

sass/partials/icon-picker.scss

@@ -92,3 +92,7 @@
   }
 
 }
+//This moves the modal from tbe background to the foreground so that it is actually visible
+.ui-front{
+  z-index: 9999 !important;
+}

sass/searchboxexpander.scss

@@ -68,4 +68,9 @@
     display: none;
   }
   //bottom line end
+}
+
+//This moves the modal from tbe background to the foreground so that it is actually visible
+.ui-front{
+  z-index: 9999 !important;
 }