Load Genshin graphics settings from globalPerfData

[shatyuka]

Fix inconsistency with in-game settings.

Loading mechanism:
First try to load globalPerfData, and the current graphics quality option is saved in saveItems entryType 18. Then patch the selected graphics quality preset using entries in saveItems.
If globalPerfData does not exist (older versions), try to import it from graphicsData. May not be needed, but it's done anyway.

graphicsData	globalPerfData
currentVolatielGrade	saveItems entryType 18
customVolatileGrades	saveItems (-1 to zero-based)
volatileVersion	portedVersion

GlobalPerfData will now be used as the data source for the UI.
Also change the relevant enums to zero-based.

globalPerfData, High graphics quality, Antialiasing changed to SMAA

{
    "saveItems":[
        {
            "entryType":18,
            "index":3,
            "itemVersion":"CNRELWin4.1.0"
        },
        {
            "entryType":8,
            "index":2,
            "itemVersion":"CNRELWin4.1.0"
        }
    ],
    "truePortedFromGraphicData":true,
    "portedVersion":"CNRELWin4.1.0",
    "portedFromGraphicData":false
}

Maintainer Edits:
Related to #295

[bagusnl]

Looks all good on me for the scope of fixing this bug. Tested the artifact output and runs fine. Though needs extensive testing to make sure everything is alright.

[bagusnl]

Re-approving last changes as discussed in Discord

[neon-nyan]

LGTM! As per latest changes, I would say that these changes can be merged.