Fix: Vote option on proposal

[sk-enya]

• show the alert as already voted if hasVoted
• else show the button for casting vote in case of active sate proposal

#424

[codecov-commenter]

Codecov Report

Merging #429 (2b43568) into develop (cecb468) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #429   +/-   ##
========================================
  Coverage    76.09%   76.09%           
========================================
  Files           81       81           
  Lines         3037     3037           
  Branches       469      469           
========================================
  Hits          2311     2311           
  Misses         726      726           

Flag	Coverage Δ
batch-submitter	59.51% <ø> (ø)
contracts	86.05% <ø> (ø)
core-utils	68.16% <ø> (ø)
data-transport-layer	37.68% <ø> (ø)
message-relayer	72.22% <ø> (ø)

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