undo should understand hydra commands executed as one action #417
Description
I've found hydra to work really well with functions which don't change the buffer (e.g. screen scaling, sexp/nxml/org structural navigation, etc.
On the other hand when using hydra with buffer-modifying functions (e.g. paredit slurps/barfs), the undo history understands each head as an individual action, and it takes many commands to undo them, which is to me unintuitive.
This is more of a feature request, maybe via an option variable to enable it, but it would be really awesome if hydra could make the commands executed in one hydra "session" to be understood as a single action.