Rewrite of the #204 fix to support multiline metadata
IsMetadataArgument(): add some more exit conditions
Merge pull request #389 from Gama11/MetadataShorteningMultiline

Rewrite of the #204 fix to support multiline metadata
Add GitHub link to the startpage
Merge pull request #409 from Gama11/startpageGitHub

Add GitHub link to the startpage
Add Collapse All / Expand All to the Settings Dialog
Merge pull request #412 from Gama11/SettingsDialogExpandCollapse

Add Collapse All / Expand All to the Settings Dialog