Boxart loading gets slower when decending alphabetical order

[user18081972]

When having boxart enabled, highlighting a game can cause twilightmenu++ to freeze for up to 8 seconds (even the menu music will hang) if the game title starts with a Z, but will take less than a second if the title starts with an A.

I have +10,000 images in the boxart folder. This is likely the cause. But it seems that the way its searching for the boxart file could be optimized for larger file counts.

Enabling cached mode doesnt help, enter a folder with 40 games starting with Z will take 5 minutes to load, each time the folder is opened.