Attempted fix of Tick Holds

NoteDataUtil::GetTotalHoldTicks() was not counting the last tick of
holds which ended on the last row of the song. Extended the range to
include the last row.

NoteDataUtil::GetTotalHoldTicks() was counting number of rows held, when
it should only count 1 regardless of number( at least to mimic pump )

Player::CrossedRows() was assuming a constant tick rate over the crossed
rows, leading to potentially inaccurate tick counts.

Pump holds were counting "HoldNote_Held" due to capitalization in the
metrics. Fixed metrics and made "IsGame" function case insensitive.

Themes/_fallback/Scripts/03 Gameplay.lua

@@ -8,7 +8,7 @@ local function CurGameName()
 end
 
 -- Check the active game mode against a string. Cut down typing this in metrics.
-function IsGame(str) return CurGameName() == str end
+function IsGame(str) return CurGameName():lower() == str:lower() end
 
 -- GetExtraColorThreshold()
 -- [en] returns the difficulty threshold in meter