GitLab

Removed useless comments
Removed useless constructions of QFileInfo when creating a new Media instance.
Corrected header

This commit contains some crappy-things, such as a call to the mainloop
during a layout re-organisation and should be removed ASAP.

This reverts commit b99c1c6e.
There's a blocker which needs to be fixed first.

This works for adding/removing clip

Avoided segfault when playing track two times

Corrected Clip workflow, seems kinda functionnal, but will need more
testing...

- added an arrow in the ruler sticked to the cursor
- the height of the ruler has been increased
- small fix to avoid a 1 pixel width for the project duration

Handle multiple selection (SHIFT + CLICK) and movements inside the
timeline frame (CTRL + CLICK)