Fix the issue where the icon for UnlockableContent characters in the text isn't centered on the character (#12262)

* Let the logic display enable allowRectanglePlacement.

* Fix the issue where the icon for UnlockableContent characters in the text isn't centered on the character

core/assets/contributors

@@ -194,4 +194,5 @@ TheCuber
 Jovinull
 Alon
 硫缺铅/PyratiteNoLead
-Space
+Space
+NeilGreenFly

core/src/mindustry/ui/Fonts.java

@@ -153,8 +153,8 @@ public class Fonts{
         glyph.v = region.v2;
         glyph.u2 = region.u2;
         glyph.v2 = region.v;
-        glyph.xoffset = 0;
-        glyph.yoffset = -size;
+        glyph.xoffset = (size - glyph.width) / 2;
+        glyph.yoffset = (size - glyph.height) / 2 - size;
         glyph.xadvance = size;
         glyph.kerning = null;
         glyph.fixedWidth = true;