Add Reset Target tslime Pane as a vim til

vim/reset-target-tslime-pane.md

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+# Reset Target tslime Pane
+
+The combination of [`tslime`](https://github.com/jgdavey/tslime.vim) and
+[`turbux`](https://github.com/jgdavey/vim-turbux) make running tests from
+Vim in a tmux session as easy as a single key binding. One problem that can
+arise from time to time is having `tslime` focused on an undesired tmux
+window/pane combination. There is no binding to tell `tslime` that you'd
+like to re-select the target window and pane.
+
+I've often resorted to closing out of Vim in order to reset the prompt.
+There is a better way and it doesn't require you to wipe out your Vim
+session.
+
+Just `unlet` the global Vim variable for the `tslime` plugin like so:
+
+```
+:unlet g:tslime
+```
+
+The next time you invoke `turbux` it will see that `g:tslime` isn't set and
+will prompt you for a new window and pane combination.
+
+h/t Josh Davey