[Feature]: Add a load quicksave hotkey

[lL1l1]

Describe the Feature

Since there is a quicksave hotkey, there should be a corresponding quickload hotkey to make iterating on your gameplay with quicksaves easier. Additionally, quickload on a key is a typical feature of many games, so it is expected to exist if quicksave exists.

This lua code runs the quick load for a skirmish in the US localization:

local path = GetSpecialFilePath(import("/lua/user/prefs.lua").GetCurrentProfile().Name, "QuickSave", "SaveGame")
LoadSavedGame(path)

I adapted it from the quicksave function:

fa/lua/ui/game/gamemain.lua

Lines 1073 to 1098 in 727125e

	function QuickSave(filename)
	if SessionIsActive() and
	WorldIsPlaying() and
	not SessionIsGameOver() and
	not SessionIsMultiplayer() and
	not SessionIsReplay() and
	not IsNISMode() then
	local saveType
	if import("/lua/ui/campaign/campaignmanager.lua").campaignMode then
	saveType = "CampaignSave"
	else
	saveType = "SaveGame"
	end
	local path = GetSpecialFilePath(Prefs.GetCurrentProfile().Name, filename, saveType)
	local statusStr = "<LOC saveload_0002>Quick Save in progress..."
	local status = UIUtil.ShowInfoDialog(GetFrame(0), statusStr)
	InternalSaveGame(path, filename, function(worked, errmsg)
	status:Destroy()
	if not worked then
	infoStr = LOC("<LOC uisaveload_0008>Save failed! ") .. errmsg
	UIUtil.ShowInfoDialog(GetFrame(0), infoStr, "<LOC _Ok>")
	end
	end)
	end
	end

It's worth nothing that "QuickSave" is the localized string "<LOC QuickSave>QuickSave".

Quickload also needs the same conditionals as QuickSave (active session, campaign vs skirmish, not multiplayer or replay, etc.).

Expected Behavior

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Screenshots

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Additional context

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