Administration: Improve consistency of the disabled buttons styling.

A few buttons had the `cursor: not-allowed;` style applied, which has now been removed. This styling is unnecessary and only introduces inconsistency with other disabled buttons styling.

For the removed styles in `colors/_mixins.scss` it is also worth noting that a style related to interaction should not live in a file that contains mixins dedicated to colors.

- Removes the `cursor: not-allowed` style from buttons mixins in `colors/_mixins.scss`.
- Removes the remaining 3 occurrences for the classic 'Custom HTML' widget, the Theme / Plugin file editors and in the Customizer when reordering menus or widgets.

Developed in #14040

Props sainathpoojary, dhruvang21, afercia.
Fixes #66251.


git-svn-id: https://develop.svn.wordpress.org/trunk@64229 602fd350-edb4-49c9-b593-d223f7449a82

Author: afercia

src/wp-admin/css/colors/_mixins.scss

@@ -40,7 +40,6 @@
 		background: tokens.$gray-100;
 		border-color: transparent;
 		color: tokens.$gray-600;
-		cursor: not-allowed;
 	}
 
 	&.active,
@@ -89,7 +88,6 @@
 		background: transparent;
 		border-color: tokens.$gray-300;
 		color: tokens.$gray-600;
-		cursor: not-allowed;
 	}
 }
 
@@ -127,6 +125,5 @@
 		background: transparent;
 		border-color: tokens.$gray-400;
 		color: tokens.$gray-600;
-		cursor: not-allowed;
 	}
 }

src/wp-admin/css/common.css

@@ -3625,10 +3625,6 @@ img {
 	padding: 0;
 }
 
-#template .submit input[type="submit"][disabled] {
-	cursor: not-allowed;
-}
-
 #templateside {
 	float: right;
 	width: 16em;

src/wp-admin/css/customize-controls.css

@@ -2545,8 +2545,7 @@ body.cheatin p {
 .reordering .add-new-widget,
 .reordering .add-new-menu-item {
 	opacity: 0.2;
-	pointer-events: none;
-	cursor: not-allowed; /* doesn't work in conjunction with pointer-events */
+	pointer-events: none; /* Also resets the cursor style. */
 }
 
 .add-new-widget::before,

src/wp-admin/css/widgets.css

@@ -796,10 +796,6 @@ ul.CodeMirror-hints {
 	z-index: 101; /* Due to z-index 100 set on .widget.open */
 }
 
-.widget-control-actions .custom-html-widget-save-button.button.validation-blocked {
-	cursor: not-allowed;
-}
-
 /* =Media Queries
 -------------------------------------------------------------- */