Keep search suggestions, during typing in search field
Add a break to ajax_qsearch()
When the search input is still only a few characters, the number of matching pages is big.
Browsers have heavy work to progress this whole return, better cut off so only the part that is directly displayed will be sent.
use var and remove suggestions when needed
Use variable for maximum number of suggestions for quicksearch.
And hide suggestions when search field is emptied, or when no suggestion are found.
Merge pull request #170 from splitbrain/dont_hide_searchsuggestions

Don't hide search suggestion during typing & limit suggestions.