Gray out entries unrelated to search results

[comradekingu]

Right now anything that doesn't match a search doesn't show up.

When having something typed into the search and switching to "upgrades" it isn't obvious that the listed entry/ies relate to what is in the search field.

If instead other entries were grayed out, it would still be evident more apps are in need of upgrading.

Also considered undoing the search when switching to upgrades, and bringing it back for the apps or the installed ones, but this might be forgotten about, and it also isn't the case that the search is always typed in for and in "apps"..