Wait for the new file modal to stop animating before clicking it

We now need to click the commit button 3 times:
1. To enter commit mode
2. To being staging changes
3. To submit the commit

Upgrades prettier to 1.15.3
Runs `yarn prettier-save-all` against the codebase
Most changes are due to https://github.com/prettier/prettier/pull/5519

Fixed sidebar tooltips not hiding after clicking

remove close button in tab
fix height not working in form
restored stage & unstage all changes
disable merge request radio button when staged & unstaged changes exist

updated variable name
removed un-used prop

#44846

fixed ide_tree_spec.js

hooked up commit section to activity bar
fixed commit section SVGs not loading
added the different theme defintions to the activity bar

[ci skip]