[UW] Dropdown Hover Menu 2.1.0

FIXED: 1. When right menu on hover is disabled, it is still closing the menu on mouse leave. It should work like there is no DHM add-on used at all.

FIXED: 2. The add-on shouldn't work on any other links other than the main menu link. Like for example it shouldn't work on "Filters" link.

FIXED: 3. When "Enable right menu on hover" and "Close menu on mouse leave" is checked, and when your mouse leaves the links in the right menu with the cursor moving up, the menu stays open.

FIXED: 4. I've also noticed an issue with the Conversations and Alerts menu's flashing once, and then working properly on subsequent mouseovers.

FIXED: 5. When going to the right menu with the cursor from the bottom, sometimes the menu opens and sometimes doesn't. From top and left it works always.