[BUG] Incorrect dimensions calculation in update_status?

[chtenb]

Describe the bug In update-status.lua:

local usable_width = pane:get_dimensions().cols - tab_bar_width - 2

Shouldn't this use the cols of the entire window instead? The status bar is not limited to a pane, and if you have a vertical split, the pane cols are half of the actual space, which makes the right status part disappear incorrectly in some cases.

To Reproduce Steps to reproduce the behavior:

1. Have some tabs open
2. Open a vertical split in one of the tabs
3. watch the right status disappear

Expected behavior See right status as long as there is space

Desktop (please complete the following information):

• OS: [e.g. Windows]
• Versionwezterm 20240520-135708-b8f94c47