Esteemed Maintainers,

Attached are patches that bring in a few more polishings to the kdenlive
package.

1. Update kdenlive to 20.08.1
2. Add missing dependencies
3. Simplify 'wrap-executable phase

Notable is the fact that with patch #2 that adds a few missing
dependencies, kdenlive can now, finally, open files from the file-system
via it's file-chooser.

Regarding patch #3, while it does simplify the wrap-phase, the final
wrapper's exported variables are supersets of the previous wrapper's
exported variables. I noticed no regressions, and noticed that this change
gives 2 lines fewer warnings/errors.