Fixed a lot ext-network forms, {%get=foo%} introduced, a lot array elements added

Fixed a lot ext-network forms, {%get=foo%} introduced, a lot array elements added
- Fixed all form for ext-network to handle dynamic parameters correctly
- Introduced new EL: {%get=foo%} is now a helper EL to insert parameters from
  GET request, still this doesn't support extra functions but will be added soon
- Added a lot array element translations for many networks
- TODOs.txt updated