BUG: 408387
FIXED-IN: 19.08.0
Currently Dolphin only opens a new instance of itself in the following two scenarios:
1. No other Dolphin instances ( D21666 deals with not matching daemonized instances) are currently running.
2. A new instance is explicitly asked for via: `dolphin --new-window`
A third scenario is needed to fix this bug:
3. If no URLs are passed in as arguments then open a new instance.
This patch adds this third scenario.