* entering a savegame description did not work anymore
* the length check was too restrictive and always underestimated the available space
* use the console font for entering a savegame description. This has more characters and better contrast for this content.
* the interface to the text enterer used bad measurements.
This was broken by several small unicode-incompatible code fragments.
This commit also removes the input limit for the player name and the savegame description. With multibyte encoding, limiting them to a fixed length did not work right.
Currently these will just overflow the fields if the text becomes too long, this needs some additional work.
