[Places panel] Revamp the Recently Saved section
Revamp the Recently Saved section, including the following changes:
- Change the section name to "Recent"
- Change the name of the existing entries to "Modified Today" and "Modified Yesterday", for clarity.
- Add "Recent Files" and "Recent Locations" item corresponding to recentlyused:/files and recentlyused:/locations listing the last 30 files or directories accessed in the current activity, and adjust the code to support this.
Adds "Recent Files" "Recent Locations" entries to user accounts places recent group.
Subscribers: meven, trickyricky26, andreask, huftis, svenmauch, kde-frameworks-devel, spoorun, andreaska, gregormi, markg, alexeymin, broulik, elvisangelaccio, dfaure, davidedmundson, ltoscano, Konqueror
Maniphest Tasks: T8349
Differential Revision: https://phabricator.kde.org/D7446