[NetworkBrowser] Inconsistency on mount update popups

[prl]

In the Mounts Editor screen, if the user presses GREEN Save, and then EXIT when either the "Your network mount has been activated." or the "Your network mount has been updated." popups appear, the user is returned back to the Mounts Editor screen instead of the behaviour when OK is pressed or the popup times out, which is to go back to the Network Browser screen.

In the Mountpoints management screen, if the user presses YELLOW Delete mount and then EXIT when the "Your network mount has been removed." screen appears, the displayed mount list is not updated. The list is updated if the user presses OK or the popup times out.

In both cases the user may think, incorrectly, that the change was not applied when it has been applied.