Many improvements to AutoSign

[RealMuffinTime]

Type of change

• [x] New feature

Description

• Remove hardcoded time placeholder from MeteorStarscript.java
• Added persistent settings to save sign lines to
• Added Starscript support
• Added possibility to also apply back side of sign
• Added possibility to overwrite or keep existent text on sign When not applying anything, open edit screen normally

How Has This Been Tested?

• Placing many signs, in diffrent situations
• On a local vanilla server.
• Some SMP servers.

Checklist:

• [x] My code follows the style guidelines of this project.
• [x] I have added comments to my code in more complex areas.
• [x] I have tested the code in both development and production environments.