Fixes for some minor positioning annoyances

[Oaphi]

This is a minor PR addressing positioning annoyances that drive me mad every time I see them.

Filters "delete" button before the change:

And after:

Search OAuth apps button before the change:

And after (the icon is changed from textual to icon-based to align with every other search input):

[cellio]

LGTM, but one question: where is that OAuth page on the site? (How do I navigate to it?) I don't recognize that, and I didn't find it on a quick walk through my profile tabs.

[Oaphi]

#1470 (comment)

@cellio from what I understand, they are unlinked, at least for now (I may be mistaken), but can be navigated to via a direct URL (just substitute micro_auth with oauth in routes definitions). Even if they are unliked for jow, we will need them for a proper API, so it amde sense to me to fix them while I am at it.

[cellio]

I totally agree on fixing them; I was just trying to figure out why I'd never seen that. :-)

[cellio]

What is the effect of removing these?

[Oaphi]

@cellio no effect that I managed to notice while checking other than the positioning of the "delete" button being fixed. All the other instances have CSS that make these rules redundant.