Delphi Menu Plugin 0.6.0

• Add inline-flex as a keyword for display
• Add a basic "Styles" tab to Devtools.
• Fix an error with cancellable events.
• Correctly update element outline and border when changing style.
• Updated Style API.
• Fix visual twitch with italic or bold text.
• Fix min/max size CSS properties not doing anything.
• Missing semicolons in CSS will be treated as warnings instead of errors.
• Improve element tooltip handling
• Add commands for managing an open page's viewers
• Use delphi.commands.devtools as permission for devtools command
• Add default styling for <sup> and <sub> elements.