Bug 1935198 - Port to Thunderbird: Try to unship moz-user-input. rs=bustage-fix DONTBUILD

Port of https://hg.mozilla.org/mozilla-central/rev/f5c5a3fee9f482b80edbc474d04070ec8320eb2b

mail/test/static/browser_parsable_css.js

@@ -33,7 +33,7 @@ const ignoreList = [
   },
   {
     sourceName:
-      /\b(scrollbars|xul|html|mathml|ua|forms|svg|manageDialog|autocomplete-item-shared|formautofill)\.css$/i,
+      /\b(scrollbars|xul|html|mathml|ua|EditorOverride|contenteditable|forms|svg|manageDialog|autocomplete-item-shared|formautofill)\.css$/i,
     errorMessage: /Unknown property.*-moz-/i,
     isFromDevTools: false,
   },