[MIN] Changed SASS output filename and bundle name
[MIN] WebAssets detects changes in SASS top-level
[IMP] RoomBooking style migrated to SCSS
[MIN] RoomBooking bars color homogenization
[IMP] RoomBookingCalendar displays blocked rooms
[MIN] RoomBookingCalendar style

* Transition effect to hover over bars
* Some SASSification
[IMP] RoomBookingCalendar conflict detection

* Prompts 'skip conflicting days' if blocking is found
* 'Unable to book' dialog reworded to fit both conflicts and blockings
[MIN] Code readability
[IMP] RoomBookingCalendar clicking on blocked room
[MIN] IcoMoon: location icon looks nicer
[MIN] IcoMoon: Calendar icon looks nicer
[MIN] Added WebHostingHub Glyphs to THANKS
[REF] Moved rules from Default.css to SASS files
[IMP] RoomBookingBookRoom style
[MIN] IcoMoon: Time icon looks nicer

* Previous time icon renamed to icon-alarm
[MIN] Home page 'Upcoming events' icon-alarm
[NEW] jquery-ui-multiselect-widget in ext_modules
[REF] Fab install_deps for jquery-ui-multiselect

* Added recipe for jquery-ui-multiselect-widget
* Removed old jquery-ui-multiselect-widget files
* Moved customized css to corresponding SASS file
* Updated references in assets.py
[REF] Moved jquery.multiselect custom style rules

* New SASS folder for ext_modules customization
[MIN] webassets change-awareness in custom SASS