maitty v0.43.0

Heads-up: leader + b now opens the Branch view in the side panel; its first row is the old branch switcher. The key's action is now named branch (switch-branch in older configs still works).

• Fixed: a click into a pane gives it the keys beside an open view
• Fixed: lay out drawn markdown once, and keep it inside the width
• New: markdown previews pretty, m shows raw
• Fixed: show the Branch view's git errors and a gone upstream
• New: a Branch view in the side panel
• Fixed: the Files filter shows the tree in a narrow panel
• Fixed: Files in the panel works with the mouse
• New: Files opens in the side panel
• Fixed: keep a row's changed lines still on hover
• New: a row's changed lines open its Changes
• Fixed: a view opened from shortcut mode takes the keys
• New: resize the side panel and remember its width per view
• New: show the version under general updates
• Fixed: keep tests off the real clipboard
• Fixed: backspace in an empty inbox search crashed
• New: one-line session rows with agent and changed lines
• New: shortcut mode stays until you leave it
• New: padding round the screen and one rounding setting