* Unify the custom options dialog (previously accessed through F5), and
the in-game options dialog accessed through the Global Main Menu.
* Change the default keybinding for F5 to show the GMM for the non-25th
anniversary editions of the game. This allows easy access to
the load and save functionality. With the 25th anniversary edition,
the main menu accessed through ESC should be used instead.
Like the original the game loop returns to the main menu
after the credits end.
The variable states are reset and the player can start
a new game or load an old one.
Fixes Trac#10675.
Previously, the credits ended as soon as the last row was shown
of the final credits image.
Now some more black rows (empty rows) are shown and finally a few
seconds of black. I set it to 8 seconds of wait beyond where
the credits where previously stopping.
In order to do this updateCredits was enhanced to work past the end
of the last credits image (and just keep adding empty rows).
The original game shows a black screen for a longer period than this.
The credit image numbers are turned into enums.
This flag is removed for a few reasons:
* Engines universally set this flag to true for widths > 320,
which made it redundant everywhere;
* This flag functioned primarily as a "force 1x scaler" flag,
since its behaviour was almost completely undocumented and users
would need to figure out that they'd need an explicit non-default
scaler set to get a scaler to operate at widths > 320;
* (Most importantly) engines should not be in the business of
deciding how the backend may choose to render its virtual screen.
The choice of rendering behaviour belongs to the user, and the
backend, in that order.
A nearby future commit restores the default1x scaler behaviour in
the SDL backend code for the moment, but in the future it is my
hope that there will be a better configuration UI to allow users
to specify how they want scaling to work for high resolutions.
It is used as a source for the fade from black effect. Ensures the first
fading effect fades from black and not the previous view.
Fixes#9929, #9930, #9931, #9932, #9933.
