Add sign documents at once feature

[tomasDostalDS]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.62%. Comparing base (0c81907) to head (cf222c4).
Report is 3 commits behind head on 2.x.

Additional details and impacted files

@@            Coverage Diff            @@
##                2.x     #228   +/-   ##
=========================================
  Coverage     97.61%   97.62%           
- Complexity      449      450    +1     
=========================================
  Files            69       69           
  Lines          1048     1052    +4     
=========================================
+ Hits           1023     1027    +4     
  Misses           25       25           

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[spajxo]

@tomasDostalDS Ještě bys to asi měl přidat na EnvelopeTemplateRecipientDefaults

[spajxo]

@tomasDostalDS Ještě bys to asi měl přidat na EnvelopeTemplateRecipientDefaults

pošlu to v dalším PR