feat(toolbar): add button to hide/show toolbar

menu.jade:
* Add toggle button to toolbar
* Add container to hide the rest of toolbar without hiding the toggle
button.

menu.styl:
* Add toggle button styles
* Update toolbar styles to account for toggle button

header.styl:
* Update rules for adding and removing padding from .header-wrap when
toolbar is toggled.
fix(i18n): correct use some strings, @lefnire I may have missed some of them, being the same messages for the whole group, we will keep them in english, anyway you can see how those should be fixed (outputting function(lang){....} instead of the value) is you encounter something else like this
Merge branch 'develop' of https://github.com/HabitRPG/habitrpg into develop
Merge pull request #3402 from benmanley/toolbar-toggle

feat(toolbar): add button to hide/show toolbar
fix(mobile): export i18n for mobile so it can temporarily use en translations
fix(profile): fix profile classes for mobile include
feat(stats): expos stats jade files to mobile
feat(filters): add button to hide tags and restyle

**filters.styl**
* restyle tags and filter controls using global styles
**filter.jade**
* add button to toggle visibility
* change controls from icons to text
**global-modules**
* add new extends and mixins for button bar and tags
**global-colors.styl**
* add tag colours
refactor(tasks): restyle task column color scheme
fix(shared): use develop branch
adding flag, allowing free rebirth purchase, adding modal
fix(i18n): default tasks checklists
Merge pull request #3449 from deilann/removingthelevelcap

Removing level cap, free rebirth at 100
fix(i18n): use everywhere i18n.getUserLanguage middleware
fix(i18n): use everywhere i18n.getUserLanguage middleware - part 2
fix(i18n): use strings
fix(modules): load i18n
fix(subscriptions): expose cancelSubscription on $rootScope (don't know
why $scope doesn't work here). Fix UI bug
refactor(menu): add total gold to gold popover
fix(filters): use k not K for thousand