* Beginning to rearrange/break out some files

* Simplifying button markup

I know I missed some

* More buttons

* Simplifying sidebar menu markup

* Moving breakpoints to a mixin

* Existing files still need to be rewritten to accommodate this change
* Also removing @import within partials (should be handled by main)

* Cleaning up forms CSS & markup

* Especially segmented controls and select controls (moving icons to
element class)

* Cleaning up account summary on dashboard

* Moderation menu cleanup

* Poll breakpoints

* Global search box tweaks

* Breaking up a few more files

* breaking up base.scss and forms.scss
* cleaning up users.scss

* Moving a few page blocks around

** Will need to verify the styling is correct once forums / topics /
etc are working again

* Left these out from previous commit

* Cleaning up header_footer a bit

* Breaking out a few more page blocks

* Removing some element selectors

* Changing sass files from tabs to spaces

* Breaking up plugins into individual files

* Renaming rtl.scss to main.rtl.scss

Consistency between admin and main naming convention

* Renaming visuallyhidden to visually-hidden

* Removing more element selectors

* Tabs to spaces in templates

* Header & footer revisions

* Will need to revisit how things in the user bar fit on smaller screens
* Additional markup / CSS changes coming to user bar soon
* Header menu will be added back later in revised form
* Breaking up header/footer CSS into separate files

* Significant user bar markup & CSS updates

Will likely need additional revisions once JS dropdown menus work again!

* User bar updates for guests

* More footer updates

* Removing more element selectors from forms

* More form element selectors gone

* Changing section to .block

May need to add block to a few more sections, but cannot confirm until
those pages (forums, topics, etc) are working again

* More generic cleanup

* Cleaning up users.scss

* Removing img from img.avatar

gasp

* Adding .icon--after

For icons that go after the text

* Page header cleanup

* More tweaks

* More button fixes

* Beginnings of topic CSS cleanup

* More topics.scss tweaks

Rearranging & cleaning up

* User bar tweaks

* Beginning of forums.scss changes

* Removing unnecessary vendor prefix mixins

border-radius, box-sizing are both well supported

* Breaking up/renaming forum, topic, post files

* More forum list cleanup

* New avatar mixin

* Changes to profile page (& a bit more)

* Changes to page control buttons

* Missed this button

There are probably others

* Consistency

MyBB 2.0 -> MyBB 2

* Rewrite of topic CSS

THIS NEEDS MORE TESTING and probably needs to be cleaned up some more,
but it’s a good starting point

* Tiny margin revision