Display effect of active gem variant when mousing over the "Variant" drop-down selector and small behaviour change to gemSelectControl

[talkmill]

Fixes #4517 .

Description of the problem being solved:

When hovering over the expanded alternate quality box there is a tooltip describing the effect of the quality when hovering with the mouse. When hovering over the "closed" box, there is no tooltip.

Steps taken to verify a working solution:

I removed the if-statement
Modified the tooltipFunc in the qualityID to display the selected item if the listbox is closed.

Link to a build that showcases this PR:

https://pobb.in/ivbVY__36yk8

Before screenshot:

After screenshot:

[talkmill]

I added a small change in how the gemselectcontrol works.

When doing the following:
Clicking the gem select listbox to show all skills, then
pressing enter or left click to get the new skill selected.

The previous behaviour was that the listbox was closed, the text of the new skill written in the Gem Select box, but not with color but rather in edit mode (with cursor in the text box)

With the change, instead of having a cursor in the text box, the skill gets chosen right away when the gem is switched and the gem select box deselected.

[talkmill]

Removed the calls to UpdateGem on focusLost as well as pressing Escape on the skillstab since it is counter intuitive that clicking away and/or pressing escape actually changes anything

[talkmill]

Fixes #863

[Wires77]

This looks good, but introduces a new behavior where if you click a slot that already has a gem in it, select a gem, then it automatically opens the next slot. Since it's not a bad change, and potentially a desirable one, I'll approve this.