Improvements for Andy mode (aka Sliding Windows)

[argentum]

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Sliding Panes (Andy Matuschak Mode) Plugin

With the official Plugin API now being a thing, it’s time to start migrating the existing Andy Matischak mode CSS into a togglable plugin with more power and options. I now have a release of an initial implementation, ready for people to play around with. It works like the 2.7 version with headers on the side. The header width and pane width is configurable via the settings, and there is also a command to toggle it on and off (which you can configure a hotkey for). Changing the active pane …