Updates close backpack icon

[Blundir]

About the pull request

Replaces red cross made in 2007 with an actual icon.

Before:

After:

Explain why it's good for the game

Placeholder bad, but not only that, the cross itself is a hitbox for click detection, and cross isn't really ideal shape for such icon since most of the people would try to hit the centre of it (~81 pixels area), and new icon has bigger centre area overall (~144 pixels) and is easier to hit because it's a lot harder to miss on a big square without blind spots and which is actually connected to the main UI body.

Sprite itself from TGMC.

Changelog

🆑
imageadd: replaces ancient close backpack red cross with a modern icon
/:cl:

[Git-Nivrak]

Make it wider, it is extremely hard to click