Refactor canvas in multiple pieces to increase maintainability (#446)

* #refactor-canvas getJsonFromSvgElement and svgroot code moved to separate file
* #refactor-canvas build files changes
* #refactor-canvas addSVGElementsFromJson move to json file
* #refactor-canvas selected element option function move separate file
* #refactor-canvas moveUpDownSelected move to select-elem
* ##refactor-canvas build file updated
* #refactor-canvas moveSelectedElements  move to selected-elem
* #refactor-canvas cloneSelectedElements move to slected-elem
* #refactor-canvas alignSelectedElements move to selected-elem
* #refactor-canvas deleteSelectedElements move to selected-elem
* #refactor-canvas copySelectedElements and groupSelectedElements move to selected-elem
* #refactor-canvas pushGroupProperty, ungroupSelectedElement move to selected-elem
* #refactor-canvas comment changes
* #refactor-canvas UndoManager move to separate file
* #refactor-canvas event file move to mouseMove, mouseUpEvent and dblClickEvent
* #refactor-canvas mouseDown move to event
* #refactor-canvas move to undo file
* #refactor alignment changes  and set function revert return
* #refactor-canvas textaction move to separate file
* #refactor-canvas paste-element function move to separate file
* #refactor-canvas set and get  method move to separate file
* #refactor-canvas set and get function moved changes
* #refactor clear file import and regaring function moved changes changes
* #refactor-canvas svg related function move to separate file
* #refactor-canvas setBackground methos move to elem-get-set file
* #refactor-canvas getBsplinePoint method move to event file
* #refactor-canvas export functions move to svg-exec
* #refactor-canvas svg related function moved separate file
* #refactor-canvas updateCanvas,  cycleElement move to selected-elem file
* #refactor-canvas removeUnusedDefElems move to svg-exec file
* #refactor-canvas blur method move to separate file blur-event.js
* #refactor-canvas selection related function move to separate file slection.js
* #refactor-canvas convertGradients, mousewheelmove event bind function move to other files
* #refactor-canvas extension function move to selection file
* #refactor-canvas svg tag long string changes to es6 format
* eslint fixes
* eslint and test fixes
* add netlify logo per their requirements
* #refactor-canvas path file separate to path-method.js and path-actions.js
* #refactor-canvas lint issue fixed
* #refactor-canvas path.js file class and const move to path-method.js
* #refactor-canvas eslint issue fixed. 'jsdoc/check-examples': 'off' already so removed eslint-disable jsdoc/check-examples
* #refactor-canvas path class moved changes and copy-elem.js file cypress test issue fixed
* #refactor-canvas UI - Clipboard paste element  cypress issue fixed
* #refactor-canvas cypress test cases issue fixed changes
* #refactor-canvas cypress test cases issue fixed changes
* #refactor-canvas cypress test case issue fixed
* npm update and fix a few eslint new errors
* fix snapshot and run tests
* add star tool to cypress
* #refactor-canvas shapelibrary, star, polygon and panning tool issue fixed
* build
* Update layer.js
* revert proper declarations

Authored-by OptimistikSAS

dist/editor/embedapi.js

@@ -102,7 +102,7 @@ function getMessageListener (t) {
 * - Have an iframe somewhere pointing to a version of svg-edit > r1000.
 * @example
 // Initialize the magic with:
-const svgCanvas = new EmbeddedSVGEdit(window.frames.svgedit);
+svgCanvas = new EmbeddedSVGEdit(window.frames.svgedit);
 
 // Pass functions in this format:
 svgCanvas.setSvgString('string');
@@ -130,7 +130,7 @@ svgCanvas.setSvgString('string')(function (data, error) {
 
 // The only other difference is when handling returns:
 // the callback notation is used instead.
-const blah = new EmbeddedSVGEdit(window.frames.svgedit);
+blah = new EmbeddedSVGEdit(window.frames.svgedit);
 blah.clearSelection('woot', 'blah', 1337, [1, 2, 3, 4, 5, 'moo'], -42, {
      a: 'tree', b: 6, c: 9
 })(function () { console.log('GET DATA', args); });