fix(core): clear dataset when disposing and fix few unsubscribed events to avoid leak

[ghiscoding]

No description provided.

[codecov]

Codecov Report

Merging #156 (1df2788) into master (073edd8) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            master      #156    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          198       198            
  Lines        11556     11626    +70     
  Branches      3943      3813   -130     
==========================================
+ Hits         11556     11626    +70     

Impacted Files	Coverage Δ
packages/common/src/editors/autoCompleteEditor.ts	100.00% <100.00%> (ø)
packages/common/src/editors/checkboxEditor.ts	100.00% <100.00%> (ø)
packages/common/src/editors/dualInputEditor.ts	100.00% <100.00%> (ø)
packages/common/src/editors/floatEditor.ts	100.00% <100.00%> (ø)
packages/common/src/editors/integerEditor.ts	100.00% <100.00%> (ø)
packages/common/src/editors/longTextEditor.ts	100.00% <100.00%> (ø)
packages/common/src/editors/textEditor.ts	100.00% <100.00%> (ø)
...src/extensions/cellExternalCopyManagerExtension.ts	100.00% <100.00%> (ø)
...ackages/common/src/extensions/cellMenuExtension.ts	100.00% <100.00%> (ø)
...common/src/extensions/checkboxSelectorExtension.ts	100.00% <100.00%> (ø)
... and 28 more

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