Resolve "RGAA 4: implementation 11.* (only form detection)"

Closes #459 (closed)

• Topic 11 - Rules with only form detection
  • 11.10.5 --> see: rgaav4#221
  • 11.10.6 --> see: rgaav4#222
  • 11.10.7 --> see: rgaav4#223
  • 11.11.1 --> see: rgaav4#224
  • 11.11.2 --> see: rgaav4#225
  • 11.13.1 --> see: rgaav4#228