* adding logo as text in replacement of umbraco_logo_white, this will enable existing configuration to continue to work and minimise the breaking change of this PR.
* adjust logo position to fit with logged-in logomark. Allowing for the logo and customised logo to be very wide.
* adding logomark in topbar of backoffice
* login box style
* correction of shadow
* Logo modal, to display more information about the product including linking to the website
* rename to modal
* stop hidden when mouse is out
* Version line without Umbraco
* focus link and use blur as the indication for closing.
* correcting to rgba
* focus and click outside needs a little help to work well
* use @zindexUmbOverlay to ensure right depth going forward.
* adding large logo svg
* append ;
* tidy logo svg file
b89cd86d85