fix(dialog): stop listening for close events when dialog closes

[yggg]

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Short description of what this resolves:

Closes #1847

[codecov]

Codecov Report

Merging #1860 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1860   +/-   ##
=======================================
  Coverage   83.87%   83.87%           
=======================================
  Files         232      232           
  Lines        7595     7595           
  Branches      670      670           
=======================================
  Hits         6370     6370           
  Misses       1027     1027           
  Partials      198      198

Impacted Files	Coverage Δ
...ramework/theme/components/dialog/dialog.service.ts	89.23% <100%> (ø)	⬆️