New design+percent support for the list style of hits panel, add option spy/spyable, hide row, histogram's height

- New list design for the hits panel using bootstrap table and add the possibility to display either percent or count.

- Replace "Spayable" by "Spy" and add the possibility to hide "Panel Spy" with spyable as collapse/collaspable.

- add height in histogram panel

- add possibility to hide a row

- add force scale in percent for yAxis

This is my first contribution on github, and the first time that I use angular and bootstrap. I hope you will enjoy what I did.
Don't hesitate to correct me !