[gnome-software] (13 commits) ...Merge branch '1111-category-tiles' into 'main'

[Philip Withnall <pwithnall src gnome org>]

Summary of changes:

  fa36e39... gs-category-tile: Use dispose() for cleanup rather than des
  a091f37... gs-category-tile: Add GObject properties
  8d9c92f... gs-category-tile: Add documentation comments
  e7f42b4... gs-category-tile: Add internal ownership comments
  b0dbd06... gs-category-tile: Rename an internal variable
  52b8598... gs-category-tile: Add category-specific CSS classes
  c17d0e5... gs-category-tile: Restyle to match new designs
  85e30bb... gs-desktop-data: Use full-colour icons for categories
  edcf16c... gs-overview-page: Move the categories to under the carousel
  ee03587... data: Use new high-resolution category icons
  21480a1... gs-overview-page: Always have ≥2 columns of category tiles
  e65ffd9... style: improve CSS on category tiles
  0145f40... Merge branch '1111-category-tiles' into 'main'