Add Desktop and Downloads to the default list of places, for the following reasons:
- The Desktop and Downloads folders are heavily used by average users, and making them accessible by default from Dolphin and file open/save dialogs is a big usability win
- We'll have space to do it without cluttering up the panel from having removed some un-useful entries in D11767: Remove Recently Saved This Month and Recently Saved Last Month entries by default
FEATURE: 203472
FIXED-IN: 5.46