feat(event): Thanksgiving Bailey
feat(thanksgiving): add migration for turkey mounts / pets
refactor(tasks) improve UI consistency

* Round corners for UI elements / “8-bit” outlines for RPG elements.
* Tag bar – Make it clearer that “Tags” is a heading, not an option
* Task filters – restyle in line with tag bar + nav menu
upgrade angular-ui-router
Fix #4259 (always 100% long bars in IE11)

Fix issue with IE11 displaying Bars with full length (style: width is ignored) by using ng-style instead of plain style.
Fixes health, level and mana bar.
Fix #4259 (always 100% long bars in IE11)

Fix issue with IE11 displaying Bars with full length (style: width is ignored) by using ng-style instead of plain style.
Fix #4259 (always 100% long bars in IE11)

Fix issue with IE11 displaying Bars with full length (style: width is ignored) by using ng-style instead of plain style.
resolve merge conflict
Merge branch 'develop' of https://github.com/HabitRPG/habitrpg into develop
Merge pull request #4291 from sbreiler/develop

Fix #4259
refactor(members): DRY some members code
feat(subscriptions): consecutive months & extra months (like a time-card)
feat(gifts): allow gifting from balance
feat(gifts): allow gifting gems from paypal/stripe
feat(gifts): allow gifting subscriptions