add thick/thicker line style options

images/border_type_4.png

images/border_type_5.png

js/src/annotations/osd-region-draw-tool.js

js/src/annotations/osd-svg-ellipse.js

js/src/annotations/osd-svg-freehand.js

js/src/annotations/osd-svg-overlay.js

js/src/annotations/osd-svg-pin.js

js/src/annotations/osd-svg-polygon.js

js/src/annotations/osd-svg-rectangle.js

js/src/widgets/contextControls.js

locales/en/translation.json

spec/annotations/mirador21Strategy.test.js

spec/annotations/miradorDualStrategy.test.js

spec/annotations/osd-svg-ellipse.test.js

spec/annotations/osd-svg-freehand.test.js

spec/annotations/osd-svg-pin.test.js

spec/annotations/osd-svg-polygon.test.js

spec/annotations/osd-svg-rectangle.test.js

spec/fixtures/annotationMirador21.json

spec/fixtures/annotationMiradorDual.json