V7 preview 2 (#463)

* commit toward svgcanvas/svgedit isolation

* jquery removal, isolate svgcavas from svgedit, tests

* refactor(panels)

* fix update of colorpickers

* update cypress

* #tool_imagelib image library menu missing in main menu

* #tool_imagelib lint issue fixed

* #seConfirmDialog confirm change to elix alertdialog

* #seConfirmDialog alert change to elix alert dialog

* #seConfirmDialog remove super.attributeChangedCallback

* #process_cancel prompt changes to alertDialog and seConfirmDialog

* refactor to class step 1

* make load faster

* #storageDialog dialog separate moved dialog

* #process_cancel alert and process_cancel changes

* #process_cancel lint issue fixed

* add seList component

* merge

* fixes

* storagedialog

* move all storage related code to ext-storage

* fix ruler

* Update ConfigObj.js

* fix resize

* Update ext-storage.js

* picker starts withthe right color

* fix prefs

* fix initial content load

* npm update and fix some tests

* npm run build

src/editor/images/linejoin_miter.svg

@@ -0,0 +1,14 @@
+<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:se="http://svg-edit.googlecode.com">
+ <!-- Created with SVG-edit - https://github.com/SVG-Edit/svgedit -->
+ <defs>
+  <linearGradient y2="1" x2="0.2" y1="1" x1="0.8" id="svg_8">
+   <stop stop-opacity="1" stop-color="#000000" offset="0"/>
+   <stop stop-opacity="0" stop-color="#000000" offset="1"/>
+  </linearGradient>
+ </defs>
+ <g>
+  <path fill="none" stroke="url(#svg_8)" stroke-width="49" d="m-15,-35l75,85l-75,75" id="svg_6"/>
+  <path transform="rotate(90, 57.8925, 50.2519)" fill="#00ffff" stroke="none" d="m44.83592,50.25187l13.05661,-13.05663l13.05661,13.05663l-13.05661,13.05662l-13.05661,-13.05662z" id="svg_2"/>
+  <path id="svg_4" d="m-15,-35l75,85l-75,75" stroke-width="3" stroke="#00ffff" fill="none"/>
+ </g>
+</svg>