Fixes poorly designed key in .tmux.conf This concerns an issue where Ctrl+Shift+f was _supposed_ to invoke a search in the scroll buffer. Instead, tmux would pick Ctrl-f, ignoring shift altogether. Furthermore, the workflow of this key was cumbersome. Upon exiting the search, tmux would remain in copy-mode, thus requiring another key to exit. This key combo was added on June 30, 2019, in commit dfd7f8c.