Swap navigation behaviour in manga mode

[LazyGeniusMan]

Hi, looks like on manga mode it's only swapping the image order in double page mode but the navigation is unchanged both arrow key and swipe touch input. IMHO it would be better if the navigation behaviour also changed so that left arrow and swipe left to right is next page

[GitHubRulesOK]

Arrows can be reassigned in latest versions such as pre-release so this seems to work for me in manga mode HOWEVER it would be there in other documents too. Thus require a pair of "-appdata" settings file one with arrows as normal and one with them for manga mode!

Shortcuts [
	[
		Cmd = CmdGoToNextPage
		Key = Left
	]
	[
		Cmd = CmdGoToPrevPage
		Key = Right
	]
]

@kjk There are suggestions that it would be best to have

• 1 Manga mode renamed to "Left to Right" and Right to Left" menu toggle available for all document types
• 2 as above a reversed set of arrow commands conditional on that mode.
• 3 perhaps a similar conditional change in swipe direction ??