[Feel free to try this branch and report problems here but note this feature is development and is not ready for use]

Issue to track the dev issues in the floating_panes branch.

1. Manage padding in tty.c
2. Floating panes should be able to be "minimised" or "lowered" to make them invisible without closing them.
3. Scrollbar slider/offset calculation. It seems that the height calculation of the scrollbar is based on the window size and not the pane size and thus when it calculates pages per scollbar scroll, it is not fully scrolling to the bottom of the screen when the scrollbar slider is at the bottom (in copy-mode).
4. Address/remove all xxxx flagged comments.
5. Fix crashing issue when opening an overlay popup with floating pane.
6. Start tmux with empty desktop or so you can start it with only floating panes from .tmux.conf
7. A way to tile a floating pane and float a tiled pane. Get join-pane and break-pane to work with floating panes. Should not be difficult. Code already supports tiling and floating panes, just need to wire things up.
8. Maybe add some buttons to the border: - ^ x to minimise, zoom, and close a pane.
9. Modify status line 2 to be the name of the window pane and not width x height.
10. There needs to be a format variable if a pane is floating so that formats can distringuish them.
11. Test/verify that the window offsets work properly, i.e. setting the window to larger than the tty size.Create sub-issues under this issue for related issues.