[4.0] Increase contrast for menu hover

[coolcat-creations]

Steps to reproduce the issue

The Menu hover has currently not much contrast so that people with poor eyesight or with a too bright environment don't see any hover indication.

Current Mainmenu

Possible Solution

[brianteeman]

Thanks for submitting this - saved me doing the same thing

[ciar4n]

PR created.. #17077

[joomla-cms-bot]

Set to "closed" on behalf of @franz-wohlkoenig by The JTracker Application at issues.joomla.org/joomla-cms/16503

[ghost]

closed as having PR #17077

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/16503.}