[IMP] Search users ignoring accents

- Allows to search for users without taking accents into account
- closes #906
[FIX] Rendering old events with hardcoded urls
[MIN] Improving naming and using index
[FIX] Encoding problems in user browser by letter
[FIX] Access with modification key

- Closes #1416
[MIN] Avoid re-check access
[IMP] Added new operation search rooms into Vidyo
[IMP] Added search rooms logic

- Added service
- Added Vidyo search logic
[IMP] Search popup for existing Video Services

- Redesign edit, delete, start, stop, connect buttons
- Closes #1200
[DEL] Deleted unused images
[FIX] Style improving
[IMP] Updated icomoon icons
[FIX] Broken css buttons and videoservices fixes
[ENH] add warning when adding new speaker

* closes #1119
* fixes previous commit bugs and converts javascript code to jquery
* code styling , rm multiple css() calls
[ENH] Add warning popup

*closes ticket 1119
*changes according to github feedback
[FIX] Minor bug adding new manager (pending user)
[IMP] Add some __repr__ methods
[MIN] Interesting events. Still very much WIP
[IMP] Add task to update category suggestion info
[IMP] Show suggestions in the dashboard