[C] Guest Book Version 1.2

This guest book will let everyone make an entry through a text box and shows it as float text.
A touch on its pages will switch through entries and the left page has a transparent overlay for a custom logo or graphic.

It has a admin menu for its owner with following options:
- Float Text with12 preset colors
- Delete Entry, to delete current entry
- Delete All, to delete all entries
- Import, to transfer entries from another nearby guest book from the same owner
- More than 500 entries possible, depending on entry length. Will block further entries if memory limit reached.

Item is including an instructions notecard (english).

Version 1.1 released july 2023

Update to 1.2 in july 2023
- Changed admin menu showing available memory for data storage now.
- Blocking further entries through user input or import when memory limit is low.