Attached is the patch to migrate pgAdmin4 currently based on Bootstrap 3, to be Bootstrap 4 compatible. The idea is to move to Bootstrap 4 with minimum possible changes in pgAdmin4. I have also used bootstrap scss (and not the dist file of bootstrap) to customize bootstrap as per the need of pgAdmin4.
I have done a basic testing. It may not look alike to that with Bootstrap 3, but it is possible that you may find some discrepancy (which was proper before :P ). Kindly let me know.
Looks good. I spotted a couple of issues though:
- The menu bar is a different colour now (dark grey rather than black). Not the end of the world, but I thought I'd mention it.
- The subnode control has lost some of it's styling. This does need to be fixed I think. See the attached screenshot ( boostrap 3 is on the left).
