Controller preferences doesn't handle unsaved mapping change correctly

[ronso0]

Bug Description

• go to Preferences -> YourController -> Inputs
• add a new control (whatever, empty entry suffices), DON'T APPLY
• close window
• Main Window is shown
• attempt to open Preferences
  = "Mapping has been edited. Save Yes/No" dialog

Version

2.5

OS

No response

[ronso0]

Oh, this happens only when closing with the X window button or hotkey ([close window] or Esc).
Base class preferencespage has a virtual hideEvent() and some pages override that, eg. DlgPrefLibrary.

I'll simply install the same for the controller page.
(slight downside: event is fired when the window is already hidden)