fixed tooltips at tops of post lists

[cellio]

Fixes https://github.com/codidact/qpixel/issues/1109 on:

• category page
• user posts page
• search-results page

There is a separate (pre-existing) placement problem on the search page, which I'll record separately.

[cellio]

I've made some changes to all three pages. For search and user posts, the only change is to turn the div into a span around the post count. The category one is more complicated. This is what it currently looks like for an admin:

and an anonymous user:

This seems to do the right thing when zooming way out. I'm not seeing the even spacing that you saw any more.

I haven't seen the buttons flow to a second line, though some comments I haven't addressed yet suggest I should. Can you review these changes and help me understand the unaddressed comments? Thanks.