SCUMM: MM (NES-EU-ES) - Last letters retained in screen/missing letters

[LukasThyWalls]

Hello.

Tested with 2.5.0 and last SVN from today, the issue affects at least only Maniac Mansion NES Europe/Spanish (I don't know if other non-english languages are affected, but english US is not).

The issue can be seen right in the intro: The last letters in the upper text box showed in some lines remains stuck there (See scummvm_maniac-nes-es_IntroLetterLeftover.gif attached).
This happen in both lines in the upper text box, and it's not only in the intro, also happens with other lines that reach that part of the screen in other parts of the game (See scummvm_maniac-nes-es_EndLettersLeftovers.jpg attached from the end of the game).
That letters remains there, they shows above other letters in sentences that reach that part of the screen, but when is a space (blank), it dissappears. Also the letter dissapears if i reset the game or load a save game.

In the original game, (obviously) that not happens, but also i found that in ScummVM is missing a letter: In the original intro shows "LUCASFILM GAMES" and in ScummVM is "LUCASFILM GAME" (And that E got stuck). (See original_maniac-nes-es_Intro.gif). I don't know if that happens with other lines in the game yet.

It's seems that the size of the upper lines box and how it's cleared it's not set or is used differently in the Spanish version (at least).

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NOTE: This is a issue redone for #3594, that is a very old report from sf that was mid-fixed but not entirely, and the only thing i can do is close it to update, so i will report it again and mark the originals as a duplicate.

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