Release v2.9.0

• (bluefox) implemented SVG shape and Screen Resolution widgets natively'
  '* (bluefox) implemented Basic iFrame as react widget'
  '* (foxriver76) only allow zip files at project import'
  '* (foxriver76) fix overflow being overwritten'
  '* (foxriver76) sort pages and projects alphabetically'
  '* (foxriver76) fixed problem on saving'
  '* (foxriver76) fixed problem with groups when always render is activated'
  '* (foxriver76) allow to change color and write lowercase in tabs component'
  '* (foxriver76) fixed problem that navigation from a alwaysRender page is shown on different page