The Timeline draws the Video switch (the eye) on every layer's row, nulls,
cameras and lights included, but set_switch_others and hide_other_video
skipped cameras and lights: Alt-clicking the eye of a selected layer neither
set them apart with the selection nor hid them with the rest.
Both now use the rule the eye cell shows: every layer but track mattes.
The label swatch's menu, the Blending Mode menu and Preserve Transparency
passed the clicked layer alone, so a colour or a mode had to be set one layer
at a time. They now act on the whole selection, with the Modes column edits
going only to the selected layers that have video, as its cells do.
The preserve-transparency checkbox also gets an automation id, like the cells
around it.
A switch click on one of several selected layers passed that layer alone to
`layer.setSwitch`, so Lock, 3D, Video (and the rest of the A/V Features and
Switches columns) had to be set one layer at a time.
The click now gives the switch to the whole selection, with the layers it
doesn't apply to left out (3D on a camera, Effect on a layer without effects,
Audio on a layer without audio, ...). The targets are picked when the press
happens, so drawing a row costs nothing more than before. A row that isn't
selected still changes that layer alone, pressing and dragging over rows is
unchanged, and Alt-clicking an A/V feature sets the selected layers apart.
- render --progress with a piped stderr writes well-formed
`progress <done> <total> <elapsed> <left|->` lines, one per change, and
the same render without the flag writes none.
- A template's Media Replacement control takes {"path"|"file"|"media": …},
is found by name ignoring case, and a path that cannot be imported fails
with an error naming the control and the path.
Camille Moine