Fix CodeMirror hints for pma purposes

- Fix styling of hint-box for modal box
- Fix to not show hints before typing anything

Signed-off-by: Nisarg Jhaveri <nisarg.jhaveri@research.iiit.ac.in>
Added autocompletion to console, inline SQL editor, create view dialogue

Signed-off-by: Nisarg Jhaveri <nisarg.jhaveri@research.iiit.ac.in>