Delete "Close and apply changes" button, add "Cancel" button and move buttons to the right

- add new CSS class "cubeviz-button"
Style permal link, make it more flashy
Style dialogs: add title, add cubeviz logo to the right, ...
Remove obsolete images
Fix cancel and "close and update" button in setupComponentElement dialog
Merge branch 'v0.6' into v0.6-munit