Minechiridion GUI Tweaks

[Delocuro]

This is just a lit of various tweaks to make to the Minechiridion GUI. I'll be adding to this as I notice things.

• The category title text in the bottom left of every menu page should be a little farther away from the bottom-left corner of the screen.
• The page title text that shows up when you hover over a page icon is not centered.
• That hover-over text should also be moved down a few pixels - it's currently touching the bottom of the icon box.
• The text descriptions for each page should be constrained to the left half of the GUI.
• The text descriptions should also have support for overflowing text - ie, if there is too much text to fit on screen, the page turn arrows appear at the bottom of the left half of the GUI. Clicking them goes to the next page of text.
• The "stitching" texture in the center of the GUI background still needs adding.
• The title of each description page isn't centered - also it should be moved to the left side of the page with the text descriptions.
• The text descriptions for each item need more margin space on the left and right sides of the GUI.
• The page titles also need more margin space above them - right now they're sort of crushed against the top of the GUI.
• The hitbox for the mouse-over name effect on the page buttons is one pixel wider than their actual texture - thus, if you have two page buttons right next to each other, mousing directly in-between them will show both articles's names at once, smashed on top of each other.