Mon: Hyperlink to ecal.ini

[FlorianReimold]

People sometimes struggle to find and edit the ecal.ini. As the monitor shows the path to the file anyways, we could easily transfor it into a hyperlink the user can click on.

[FlorianReimold]

Current solution already works fine. It however cannot open the ecal.ini on Linux as root. I want to do a workaround at some point:

1. Check the permissions

2. Query mime type:

   Shell: xdg-mime query filetype /usr/local/etc/ecal/ecal.ini
   C++: auto mime_type = QMimeDatabase().mimeTypeForFile(path);
   
   text/plain

3. Get Default application

   Shell: xdg-mime query default text/plain
   
   org.gnome.gedit.desktop

4. Unfortunatelly it stops here. But we can launch gedit with a magic parameter manually whenever we detect org.gnome.gedit.desktop:

   gedit admin:///usr/local/etc/ecal/ecal.ini

For all other cases we just let Qt open the file (it will use xdg-open). This would give us a generic solution:

• Gnome: Usually gedit is the default editor and our workaround is activated
• KDE: Usually Kate is the default editor. Kate asks the user itself to elevate the permissions when the file cannot be saved otherwise. So no action necessary.
• Fallback: The user can at least see the file, but will probably have to take care of editing it with sudo rights himself.

[FlorianReimold]

Fixed by #569