Event cancelling for manipulators

[JamesAPetts]

Add in event cancelling for manipulators.

Paste this in the netlify demo console and then you can use ESC (at least on Chrome) to test moveNewHandle, moveHandle and moveAllHandles:

const cancelActiveManipulatorsForElement = cornerstoneTools.getModule(
  'manipulatorState'
).setters.cancelActiveManipulatorsForElement;

const enabledElements = cornerstoneTools.store.state.enabledElements;

enabledElements.forEach(element => {
  element.addEventListener('keydown', evt => {
    if (evt.keyCode === 27) {
      cancelActiveManipulatorsForElement(element);
    }
  });
});

Only cancelation of moveNewHandle will solve these issues.

Note that not all tools use manipulators, other tools would ideally be switched to use them (e.g. freehand tool, bidirectional tool).

[codecov]

Codecov Report

Merging #1195 into master will decrease coverage by 0.08%.
The diff coverage is 3.8%.

@@            Coverage Diff             @@
##           master    #1195      +/-   ##
==========================================
- Coverage   18.81%   18.73%   -0.09%     
==========================================
  Files         284      286       +2     
  Lines        8518     8571      +53     
  Branches     1453     1457       +4     
==========================================
+ Hits         1603     1606       +3     
- Misses       5728     5774      +46     
- Partials     1187     1191       +4

Impacted Files	Coverage Δ
src/store/index.js	45.45% <ø> (-4.55%)	⬇️
...ispatchers/mouseEventHandlers/addNewMeasurement.js	6.25% <ø> (ø)	⬆️
src/stateManagement/toolState.js	0% <0%> (ø)	⬆️
src/tools/annotation/CobbAngleTool.js	0% <0%> (ø)	⬆️
src/tools/annotation/AngleTool.js	0% <0%> (ø)	⬆️
src/tools/annotation/ArrowAnnotateTool.js	0% <0%> (ø)	⬆️
src/util/uuidv4.js	0% <0%> (ø)
src/manipulators/moveHandle.js	6.17% <10%> (+1.17%)	⬆️
src/manipulators/moveAllHandles.js	6.89% <10%> (+1.23%)	⬆️
src/store/modules/manipulatorStateModule.js	3.57% <3.57%> (ø)
... and 3 more

---

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[dannyrb]

LGTM 👍
Discussed offline. This moves us in the right direction. Would eventually like to make this song-and-dance less magic (baked into manipulators? different abstraction?) This satisfies the core issue and is great to build off of.

[dannyrb]

🎉 This PR is included in version 4.13.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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