feature(brush): add configuration option to skip paint if the segmentation is not visible (skips event calls)

[dannyrb]

cornerstoneTools.addTool(cornerstoneTools.BrushTool, {
	name: 'Brush',
  configuration: {
	  skipPaintForInvisibleSegmentations: true
  }
})

Tests:

• cornerstoneTools.store.modules.brush.state.alpha = 0
• cornerstoneTools.getToolState(element, 'brush').data[segIndex].alpha = 0
• cornerstoneTools.store.modules.brush.setters.brushVisibilityForElement(enabledElementUID, segIndex, visible)

CC: @JamesAPetts

Other stuff:

• Shifts duplicate get/set toolState check out of strategies and into BrushTool's _paint method.
• Provides a way to prevent UX confusion of adding/removing from a segmentation while it's not visible
• Provides a way to prevent modified/completed events if we're not actually modifying brush data

[codecov]

Codecov Report

Merging #1033 into master will decrease coverage by 0.02%.
The diff coverage is 5.88%.

@@            Coverage Diff             @@
##           master    #1033      +/-   ##
==========================================
- Coverage   13.67%   13.65%   -0.03%     
==========================================
  Files         223      223              
  Lines        7398     7409      +11     
  Branches     1199     1200       +1     
==========================================
  Hits         1012     1012              
- Misses       5381     5391      +10     
- Partials     1005     1006       +1

Impacted Files	Coverage Δ
src/tools/brush/BrushTool.js	0% <0%> (ø)	⬆️
src/tools/base/BaseBrushTool.js	6.81% <14.28%> (-0.16%)	⬇️

---

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[codecov]

Codecov Report

Merging #1033 into master will decrease coverage by 0.02%.
The diff coverage is 5.88%.

@@            Coverage Diff             @@
##           master    #1033      +/-   ##
==========================================
- Coverage   13.67%   13.65%   -0.03%     
==========================================
  Files         223      223              
  Lines        7398     7409      +11     
  Branches     1199     1200       +1     
==========================================
  Hits         1012     1012              
- Misses       5381     5391      +10     
- Partials     1005     1006       +1

Impacted Files	Coverage Δ
src/tools/brush/BrushTool.js	0% <0%> (ø)	⬆️
src/tools/base/BaseBrushTool.js	6.81% <14.28%> (-0.16%)	⬇️

---

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 8f1f55d...380a1ac. Read the comment docs.

[dannyrb]

I'm going to merge this for now; but please feel free to call out issues/complaints. Ideally, this should not impact consumers by default, as the functionality is hidden by a config flag.

[dannyrb]

🎉 This PR is included in version 3.18.0 🎉

The release is available on:

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

Your semantic-release bot 📦🚀