Add missing default filenames for screencap tool
Add missing default filenames for screencap tool

If a filename wasn't passed from command line, the screencapture utility
wouldn't save anything to disk unless a preset was used instead. Now the
rendered documents are written to disk using the viewport's size and the
current timestamp by default.

Alhadis/Snippets,Alhadis/Snippets,Alhadis/Snippets,Alhadis/Snippets,Alhadis/Snippets