Multiple-Select Filter & Custom Filter

Features

• rewrote most of the Filter implementation to make Filters more modular
  • MANDATORY, if you want to use the new filters, you will have to modify your angular-cli.json, you can review the HOWTO
  • now support Multiple-Select Filter with SASS variables for styling.
    • uses a customized version of multiple-select.js to suit Angular-Slickgrid needs, read Wiki - Select Filter for more info.
  • created Single Select Filter (radio box), again read Wiki - Select Filter for more info.
  • also support Custom Filter, read Wiki - Custom Filter for more info.

Fixes

• when rewriting the Filter, I found performance issues there was 2 nested for loop while only 1 loop is enough. So there were performance impact.
• translateFormatter should only translate when it has a value

Deprecated

• Select Filter selectOptions property was renamed collection to make it more generic and re-usable with other Filter that might not be Select.
  • a console warning will be shown if you use the old property name, so it won't break any code. The old property will be removed in later versions.