In Unity the sortcut Alt + F10 allows to access the Unity Menu, including AppMenu and AppIndicators. Does Gnome Shell have a similar shortcut to manage the panel with the keyboard?
Yes. Typically this is done by entering CtrlAltTab and navigating to Panel or Top Bar. Then use your arrow keys and Enter/Return to launch. There may be more keyboard controls for the top bar but I'm not aware of them, maybe someone else will be.
Under 3.8 and possibly 3.6 there are additional helpful shell shortcuts in:
Settings(gnome-control-enter)> Keyboard> Shortcuts> System
For instance I set "Open application menu" to use the xf86menu key, so whenever I hit the Menu key, it open the appmenu. Note some things like ctrl+alt+tab can't be changed there, but an extension could probably provide this ability.
