tmux: reorder lines by function
tmux: hide clock; I already have one of those
tmux: enable mouse input
Revert "tmux: enable mouse input"

This reverts commit 215e7c0e66d0dfcf0cbbab004ffd9e314fb12eb7.

These features work as advertised and I could see myself using them, but
not at the cost of my local clipboard.

I routinely select-to-copy text from my terminal to my local clipboard.
Enabling mouse support in tmux breaks this workflow:  text is instead
copied to tmux's internal copybuffer, which I cannot easily sync with my
local clipboard buffer if tmux is running remotely.