Skip translation folding when running in EDT
Skip translation folding when running in EDT

Folding computation in EDT happens when opening a file.
Translations are still folded correctly (looks like they are computed
  later again out of EDT.)
This should silence the SlowOperations errors.

DemonWav/IntelliJBukkitSupport,minecraft-dev/MinecraftDev,minecraft-dev/MinecraftDev,minecraft-dev/MinecraftDev