Refactor GET_CATEGORY_APPS to use GsPluginJobListApps
This adds a category
property to GsAppQuery
and uses that instead of GET_CATEGORY_APPS
/gs_plugin_add_category_apps()
.
The changes are fairly straightforward (similar to all the previous job refactoring).
This MR is based on top of !1341 (merged), so don’t review the bottom half of the list of commits. It should only be merged once !1341 (merged) has landed.
This follows on from !1328 (merged).
Helps: #1472