It is not possible to tell whether DLC contents are supposed to be
present on the NAND or not, because they're treated as "optional".
So this commit changes the NAND check to not consider missing
contents for DLC titles as an issue.
Because the Wii NAND size is finite, mark titles that were installed
only for booting as temporary, and remove them whenever we need to
install another title (to make room). This is exactly what the
System Menu does for temporary SD card title data.
Change the repair logic to fix issues more aggressively by deleting bad
titles. This is necessary because of a bug in Dolphin's WAD boot code.
The UI code was updated to inform the user about titles that will be
deleted if they continue a repair, before deleting anything.
Old versions of Dolphin are so broken regarding NAND handling that
we need this to repair common issues and avoid issues with titles
like the System Menu or the Wii Shop.
This isn't an exhaustive check, but this will catch most issues
and offer to fix them automatically (if possible).
The newer title dumpers don't clobber tickets anymore (that's good!),
which means personalised tickets still have the console specific data
used to decrypt the title key in them. Dolphin should ignore that data
when importing WADs, because the title key has already been decrypted,
and we must not try to decrypt it *again*.
While setting up a proper NAND for Wii emulation has become much easier
now that disc and online system updates work, they still require users
to have a recent disc game, certificates extracted from IOS or a NAND
dump for online updates to work and to really get all system titles.
This commit adds the ability to do an online update right from
Dolphin itself, which solves that usability issue.
Allows reusing the WAD import logic more easily, whereas UICommon
code can only be used from UICommon and UI.
And managing what's on the NAND is the Core's responsability, not UI.
