Tabs are not restored on startup if Thunar was launched with a URI argument
#### Reproduction steps
1. Enable "Restore tabs on startup" in Behavior section of Thunar preferences
2. Open at least one tab
3. Close all instances of Thunar
4. Run `thunar ~`, or `xdg-open ~` if Thunar is set to the default file browser
#### Expected behavior
Previous tabs should be restored, in addition to the home folder being opened as either a new tab or window, depending on the configured "Open new thunar instances as tabs" preference.
#### Actual behavior
The home folder opens in a new Thunar instance and previous tabs are not restored. Running `thunar` while this instance is still open restores the previous tabs, potentially multiple times if run repeatedly.
Running thunar version 4.18.7.
issue