Refactors – Yanni

[YanniAlshoufiHTL]

• [x] Split CSS and JS from all HTML files (including webcomps)
• [x] See lawand's /docs/refactors.md > /public/sites/calender.html:
• [x] Fix do while loop code duplications in /public/src/aet-prompt > promptTimeChange()
• [x] Shorten /public/src/aet-prompt > submitAetInputPrompt()
• [x] SPLIT UP /public/src/global-update-calendar!!!
• [x] Eliminate multiple client s in routers and move all DB-related functionality into DatabaseService

[YanniAlshoufiHTL]

Finished.