Previously all demo players checked `IVideo::Current` to render a video, which would cause issues when rendering a demo while a demo slicing background job is running. Now video rendering can be toggled for each demo player individually and is only enabled for the main demo player.
Use member instead of static variables for demo player snapshot data. The static variables would otherwise cause issues when multiple demo players are playing at the same time, especially demo players used in background jobs for replay demo slicing. This hopefully closes#7068.
There is no reason to slice a demo while currently rendering it and it may cause issues because multiple demo players would access the same `IVideo` instance.
Use composition instead of inheritance for demo player listener to avoid temporarily storing a pointer to a local variable in a member variable.
Fix demo player file not being closed when demo recorder file cannot be opened during demo slicing.
Add assertions to check that demo recording/playback is not started when already running.
Add assertions to check that demo recording/playback is stopped before the respective demo recorder/player is destroyed.
The filename editbox and buttons of the demo render popup were rendered excessively large on Android. While too small buttons could be an issue with smaller screens, this should not be implemented solely this popup, if Android support is revived in the future, as it makes the UI layout code harder to maintain.
The TODO in the `Dilate` function is removed, as the code already appears to be safe without additional checks. The variable `k` is at most `(w * h - 1) * BPP`, as `ix` and `iy` are clamped to maximum `w - 1` and `h - 1` respectively. Because `p < BPP - 1` the index `k + p` is therefore always valid for the buffers. (The caller must ensure that the source and destination buffers are of size `w * h * BPP`.)
The entire `CEditorImage` was being overwritten when loading external images, which was causing the already loaded image name to be cleared, due to the changed order of operations (regression from #7008). This is fixed by using `CImageInfo` to load the image and only copying the relevant members to the `CEditorImage`.
This class is slightly more light-weight than a CEditorComponent
and its naming makes it more natural to inherit for envelope points,
proof-mode positions etc.
