Blockscript/Favourite icons look faded

[jkup]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Fix #4035 #4042

Test Plan:

Check that the bookmark icon is filled in orange if bookmarked and not filled in gray when not. Also now the noscript and bookmark icons should both be hidden when not in title mode.

Auditors: @bradleyrichter @diracdeltas

[bradleyrichter]

This will be temporary until we move to the left-end BM position.

noJS will get a new icon and only be shown in the URL box when the URL is visible.

[diracdeltas]

This PR introduces some design changes that are not covered by #4035 (icons no longer appear at all in titlemode, bookmarks icon is filled in completely in non-titlemode). Please open a new issue for those so QA is aware.

otherwise lgtm

[jkup]

@diracdeltas good point! fixed.