Add vertical offset parameter to the No Sync filter

[bmatherly]

As requested here:
https://forum.shotcut.org/t/filter-no-sync-horizontal-offset/45942

Depends on this PR:
dyne/frei0r#203

Note: I swapped horizontal and vertical nomenclature in the UI. The vertical offset moves the picture up and down. The horizontal offset moves the picture left and right.

@ddennedy, code review not really required. But I would like to make sure we are both on the same page for horiztonal/vertical labels.

[bmatherly]

This builds on Linux for me. I have not tried to build it in Windows or Mac.

[ddennedy]

If we have a build problem with Frei0r then alI of this PR will be reverted unless you expect me to l tease it apart because I typically do a squash merge.

[bmatherly]

If we have a build problem with Frei0r then alI of this PR will be reverted unless you expect me to l tease it apart because I typically do a squash merge.

I think squash merge and full revert would be best. Or, we could try to test the build before we merge. I see that the PR only triggers the code style check. Is there a way to make it kick full builds from the branch?

Otherwise, I can checkout the branch on Windows and test the build. But I do not have a Mac to test on.

Or maybe it is easer to merge and then deal with a broken build. I would follow your preference.

[ddennedy]

Remove the unrelated Frei0r commit and wait for me to get around to it.

[bmatherly]

The Frei0r commit is related because it will pull in this required commit that was recently merged into Frei0r master:
dyne/frei0r@2328ce3

I am happy to wait. This PR is not urgent to me.

[ddennedy]

Sorry I overlooked the Frei0r PR in the description because I was only following updates on my phone. Let’s try it. I think it was only the Windows SDK build that failed previously, and I can revisit that if needed.