Fix emote & badge tooltips not showing up when thumbnails were hidden

[kornes]

Pull request checklist:

• CHANGELOG.md was updated, if applicable

Description

fixes #4500

PR fixes display of text only tooltips for emotes and badges, according to "Show info on hover" user setting.

other changes:

• flattened one if and removed unnecessary tooltipWidget->clearEntries()
• moved emotesTooltipPreview setting next to other emote settings

[sando]

Confirmed this fixes the bug, thanks!

[pajlada]

This one is tricky because the setting name doesn't do what it says it does.
The description of the setting says whether or not to show "emote info, author" etc on hover (i.e. if the tooltip should be shown at all). The setting actually decides whether or not to show an image preview when hovering over an emote or badge, so while this change is fine it's confusing given the naming & description of the setting.

[pajlada]

@kornes if you could review the changes I've made that would be great, after that I'll go ahead and merge this in.

In short, the changes I've made are:

1. Changed the setting name in the setting page to match its actual functionality
2. Changed the setting to use an enum rather than just an int
3. Inverted the isTextOnly to showThumbnail to match the setting's "intent"