Add Playback times

[azfoo]

#180, closes #178.
WIP:
fix CLI dialog

[azfoo]

@FelipeDefensor, need a little help on this one: tests.ui.cli.test_load_media
in trying to avoid the dialog popping up on the CLI, I've called Get.WINDOW_STATE and checked for a NoReplyToRequest (because it is only served in QtUI and not the CLI), which works with the actual CLI, but fails on the test. Somewhere in the setup of the test, QtUI is initialised and is replying. Creating a new Get.UI_TYPE also fails because both UIs give conflicting responses. Any ideas on how to solve this?

[FelipeDefensor]

@FelipeDefensor, need a little help on this one: tests.ui.cli.test_load_media in trying to avoid the dialog popping up on the CLI, I've called Get.WINDOW_STATE and checked for a NoReplyToRequest (because it is only served in QtUI and not the CLI), which works with the actual CLI, but fails on the test. Somewhere in the setup of the test, QtUI is initialised and is replying. Creating a new Get.UI_TYPE also fails because both UIs give conflicting responses. Any ideas on how to solve this?

Will look into it.

[FelipeDefensor]

Ok, so this is entirely on me. Contrary to what you would expect, the marker_tl fixture requests the marker_tlui fixture that request the qtui fixture. This is first-class spaghetti that I need to unravel.

There were improvements to the tangled fixtures in v0.4.3, but apparently they were'nt enough. I will see if I can provide a permanent solution in the next few days. You can wait for that, or skip those tests with @pytest.mark.skip if you want to move on with this PR. Let me know.

[azfoo]

Marked skip for now.
Do review if you have time - don't think there's much change in the code apart from the merge/rebase.

[FelipeDefensor]

There were improvements to the tangled fixtures in v0.4.3, but apparently they were'nt enough. I will see if I can provide a permanent solution in the next few days. You can wait for that, or skip those tests with @pytest.mark.skip if you want to move on with this PR. Let me know.

Easier than I thought, so I already pushed a commit to dev dealing with this.

Will review this PR later today.

[FelipeDefensor]

Anne, sorry for the delay on the review. I was part of a congress today that took longer than I expected. Will review tomorrow, guaranteed.

[FelipeDefensor]

The code is pretty clean and everything seems to be working. I tried to be more thorough than normal in the review as experience (or trauma) tells me that media loading bugs tend to be hard to spot.

I will try to write a billion tests for this. In the meantime, there are some minor issues to be adressed.

Good job!

[FelipeDefensor]

The changes are perfect :).

Few new bugs I found:

• Pre-start and post-end were not being scaled correctly. I fixed that with a commit.
• Something goes wrong shen scaling multiple segmentlikes. I added a test for that behavior.
• Undoing a media load with scale or crop triggers the dialog again. We could either reset the undo history when loading a new media or somehow store whether the user chose the scale or crop options. I leave that up to you.

We are almost there!