Selfvote, group linking and sticky groups + some fixes

[maicol07]

Changes proposed in this pull request:

New features

• feat: :sparkles: Added selfvote option (Defaults to false)
• feat: :sparkles: Add group linking to rank (Check details in commit)
• feat: :sparkles: Added sticky group feature
• feat: :sparkles: Added option to only display the sticky rank with higher points

Fixes

• fix: :bug: Infinite loading in profile page
• fix: :bug: Deleted/Hidden post can't be expanded
• fix: :bug: No badges shown on discussions posts (Check details in the commit)
• fix: :bug: Reload page when browsing to a user profile from ranking page to avoid rendering bug

Reviewers should focus on:

All the features and fixes work well. But if you want to review something, I'll recommend checking sticky ranks

Screenshot

• New rank field for linked group:

• New sticky ranks section:

• New "only one sticky rank" switch:

Confirmed

• [x] Frontend changes: tested on a local Flarum installation.
• [x] Backend changes: tests are green (run composer test).

Required changes:

• [ ] Related Flarum core extension PR's: (Omit this section if irrelevant)

[maicol07]

@clarkwinkelmann @Ralkage what do you think of the PR?

[imorland]

Thank you for the PR @maicol07

I feel this PR needs to be broken down a little, as there's just so much going on here.

My suggestion is to split this up into seperate PR's for the fixes, and seperately the new features.

Also, please don't commit the dist files, these will automatically get built when we merge to master ;)

[maicol07]

I've splitted this PR into: #43 #44 #45 #46 

I'm going to close this to let you review the other ones

@imorland @davwheat @clarkwinkelmann @Ralkage

[maicol07]

I suggest merging the PRs from the first one since newer have the changes of the previous one