Automatically increase timenav height when groups demand many rows

[JoeGermuska]

When people use more than about 4 groups, the allocation of at least one row per-group can lead to crowding in the timenav section.

We should take the number of rows into account and make more space available.

[JoeGermuska]

I'm also seeing some surprising interactions when I set some of the options which could otherwise address this.

This example timeline has 8 groups (including one 'blank')

This is the same timeline, with timenav_height=300 Only four group labels are displayed. The markers are displayed as they are otherwise, so some end up in the "wrong" row.

This is the same, with timenav_height_percentage=50 It doesn't seem to take up 50%, and it seems like what extra space is available is allocated to the "blank" group

Adjustments to marker_height_min change the display of the markers, but not the rows they sit in.

[zachwise]

We should test this with an example that has < 8 groups

[JoeGermuska]

I tried this with a test timeline (not telling a real story) and it seemed OK, but when I tried the example from above, I see a few cases where markers overflow group "lanes." Is that something we can control?

[zachwise]

Thanks, probably an error in my height calculation.