[4.0] ] fix color selector box too big issue (#33611)

I am not 100% convinced this is the correct solution but based on the accepted code in #30585 it is a working solution.

Author: brianteeman

build/media_source/system/scss/_jquery-minicolors.scss

@@ -1,8 +1,8 @@
 // Overrides for jQuery Minicolors
 
 .minicolors-theme-bootstrap .minicolors-swatch {
-  width: 40px;
-  height: 40px;
+  width: 36px;
+  height: 36px;
   > .minicolors-sprite {
     top: 50%;
     left: 8px;