fix(core): properly dispose plugins to avoid detached DOM elements

[ghiscoding]

3rd pass to fix #625

[codecov]

Codecov Report

Merging #628 (c3fcd67) into master (a9f7027) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            master      #628    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          149       149            
  Lines        10062     10075    +13     
  Branches      3398      3548   +150     
==========================================
+ Hits         10062     10075    +13     

Impacted Files	Coverage Δ
...ules/angular-slickgrid/services/resizer.service.ts	100.00% <ø> (ø)
...lickgrid/components/angular-slickgrid.component.ts	100.00% <100.00%> (ø)
...es/angular-slickgrid/editors/autoCompleteEditor.ts	100.00% <100.00%> (ø)
...dules/angular-slickgrid/editors/dualInputEditor.ts	100.00% <100.00%> (ø)
...p/modules/angular-slickgrid/editors/floatEditor.ts	100.00% <100.00%> (ø)
...modules/angular-slickgrid/editors/integerEditor.ts	100.00% <100.00%> (ø)
.../modules/angular-slickgrid/editors/sliderEditor.ts	100.00% <100.00%> (ø)
...pp/modules/angular-slickgrid/editors/textEditor.ts	100.00% <100.00%> (ø)
...rid/extensions/cellExternalCopyManagerExtension.ts	100.00% <100.00%> (ø)
...-slickgrid/extensions/checkboxSelectorExtension.ts	100.00% <100.00%> (ø)
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a9f7027...c3fcd67. Read the comment docs.