fix(datepicker): fix disabled state setter

[IlyaSurmay]

Fixes #2712

• read and followed the CONTRIBUTING.md guide.
• built and tested the changes locally.

[codecov]

Codecov Report

Merging #2798 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development    #2798   +/-   ##
============================================
  Coverage        70.48%   70.48%           
============================================
  Files              137      137           
  Lines             4089     4089           
  Branches           711      711           
============================================
  Hits              2882     2882           
  Misses             909      909           
  Partials           298      298

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