Gathered browser/overview templates in a single place

Pick notes: Did several adjustments because our codebases had diverged over
    the time.

Conflicts:
	pootle/apps/pootle_translationproject/views.py
	pootle/templates/browser/_progressbar.html
	pootle/templates/browser/_table.html
	pootle/templates/browser/overview.html
Minor cleanup

Pick notes: The rest of the changes don't apply.

Conflicts:
	pootle/templates/browser/_progressbar.html
Cleanup: minor styling nit
Added missing bidi fixer call

Conflicts:
	pootle/templates/browser/overview.html