1) Frame ("f" hotkey) presently has two issues...
1a) Framing with multiple GOs selected, presently only frames the first selected GO. This should frame all selected GOs.
1b) Framing with nothing selected, presently does not do anything. This should frame everything in the scene view.

This behaviour is presently inconsistent with the Animation Window (ex: Dopesheet). The behaviours should be exactly the same (for less muscle memory) in the scene view and Animation Window (selecting GOs vs. Keys).

2) Auto-fit ("a" hotkey) feature request:
We should also be able to frame everything (exactly like "f" with no selection), but without having to un-select everything.
This should be possible using "a" hotkey, which ignores the current selection and frames everything.

This is extremely useful when you want to quickly back out from a selection, without loosing this selection in order to use "f" to re-focus on the currently selected GO(s).