* Autocomplete toggle improvements:
* Refactor to its own component.
* Show state in tooltip (enabled/disabled).
* Disable the toggle if autocomplete is not possible (no schema/too many tokens).
* Remove unsued code.
* Custom icons font (currently has only two icons).
Generated with Icomoon. If we extend its use, we should probably automate this and move to its own package.
* Don't disable live autocomplete for data sources without schema.
It can still be useful to autocomplete from local keywords.
* Differentiate between autocomplete toggle states with an icon.
Also added explicit message for the disabled state.
* Remember thes state of autocomplete.
* Only auto register init functions.
