• #53 When open the development tool, we will be asked which application normally use.
• fixed mermaid flowchart and sequence diagram is clashed.

• #36 Add MathJax Support (Code block only)
• #2 Add original menu
• #50 Remove webview

#52 gantt support is broken.

• #48 The style for mermaid affects the elements of viz.js and uiflow.
• #49 The cloneCssStyles option of mermaid has been removed.

• #47 empty div nodes increases each time mermaid draws

#46 fix to enclose the paragraph in <p>

Fixed weak sanitizing by introduce sanitize-html.

#43 Create new window when open file dialog is canceled.

• #41 File Open Fails when already file opened
• #42 preview fail where start with filename

fix #40