Bug 1625604 - Move pointer-events: none declaration for option to forms.css. r=snorp

This is a bit hacky, but is how it used tow work without the native theme. We
may be able to do better.

<input type="date"> / <input type="time"> work the same way with and without the
other two selectors, because they never match since we moved them to shadow DOM
in Firefox 65 (bug 1496242).

Differential Revision: https://phabricator.services.mozilla.com/D69552

--HG--
extra : moz-landing-system : lando

layout/style/res/forms.css

@@ -405,6 +405,14 @@ optgroup:before {
   content: attr(label);
 }
 
+%ifdef ANDROID
+/* These elements are handled by the prompt module. */
+select option,
+select optgroup {
+  pointer-events: none;
+}
+%endif
+
 *|*::-moz-dropdown-list {
   z-index: 2147483647;
   background-color: inherit;

layout/style/res/geckoview.css

@@ -32,13 +32,6 @@ textarea,
   background-color: white;
 }
 
-/* These elements are handled by the prompt module. */
-select option, select optgroup,
-input[type="date"] div:-moz-native-anonymous.datetime-input-box-wrapper,
-input[type="time"] div:-moz-native-anonymous.datetime-input-box-wrapper {
-  pointer-events: none;
-}
-
 select:not([size]):not([multiple]),
 select[size="0"],
 select[size="1"],