Gutyán Gábor / circlestack

- change default button to simply represent a time
- add max-width 100% for graphs

- highlight the currently selected option
- switch the images via js

closes #268

- fix bootstrap class name
- make the activity timeline more readable on smaller screen

- users without customize privilige can change name, also the form
  will validate correctly
- if we open it without modal, on error the modal will not be shown
  again

Too many SQL queries

dashboard.js: save cookie, an input handler, plus a function for ClientChecking page that uses the previous two function