GUI icons, typed text boxes, and teleport fixes

Fixed

• Fixed gui: and first-person: appearances being ignored on items with armor3d:.
• Fixed a stray square appearing beneath typed text boxes when combining resource packs.
• Typed text box character limits now match the space available, so counters can reach the limit.
• Fixed errors from overlapping teleports on Folia-based servers, including Canvas. Pending moves now wait for the active teleport, using the newest requested destination.