magic pack template now uses 'pack type' instead of 'pack item'

don't allow a new pack to be 'removed'

custom pack types can now be removed again.

use set_help_text instead of the previous thing in SetWindow.

   typing1 Ctrl+Z Ctrl+Y typing2 Ctrl+Z
removes just typing2, not both.

There is no UI for using these custom types yet.

- added DoGetBestSize to PackTotalsPanel, so the text always fits

- The tag_contents script function now works as advertised:
     - uses 'input' script variable instead of 'contents'
     - keeps the full old tag, not the one from 'tag'
     - no template code in svn breaks.

added check_tagged function that verifies that a tagged string is correct, this helps with debugging.

fixed bug in keyword parsing: seperator_after contained the whole string, causing it to be duplicated

Added first version of horizontal cycle to magic.mse-game/add_cards_scripts. Should be expanded upon when dialogs are done.
Altered magic.mse-game/packs to give illusion of handling mythic rares by including in rare pack items.
Tweaked text size on magic-new-token.

This allows auto replaces to be properly loaded from the game file.

Put ~ back in text_filter.  Why?  Because I believe that 99.9% of users won't realize to update their automatic text replacements, and will report an error that the tilde no longer functions.  Is it possible to just have automatic text replacements update when new ones are added, while keeping custom ones?