Whether textscreens should have a tool whitelist or a blacklist?

[stepa2]

(From discussion in #90.)

Whitelist (current state):

• Pros:
  • New tools that are affected by ENT:CanTool are unable to break textscreens.
  • Less error reports.
• Cons:
  • Allows tools that are not affected by ENT:CanTool to break textscreens.
    • E.g. anything with range-selection, like SmartWeld area selection, AdvDupe2 area copy and Multi-Parent area selection, I guess.
  • Disallows all tools that are compatible but not whitelisted.
  • More whitelist extension requests.

Blacklist:

• Pros:
  • It is possible to block tools that cause errors.
  • New and existing tools that don't break textscreens will be allowed automatically.
• Cons:
  • More error reports.

Blacklist and whitelist, switchable by convar:

• Cons:
  • Will cause more error reports and whitelist extension requests.