Update public/index.html

See merge request !88

Update public/index.html, public/previewImages/placeholder.png,...

See merge request !87

Update public/index.html, public/previewImages/placeholder.png, public/previewImages/exit.png, public/previewImages/robot.png

Test for menu bar with placeholder image

See merge request !86

Update public/index.html

See merge request !84

Update public/index.html

See merge request !83

Update public/index.html

See merge request !82

Update public/index.html

See merge request !81

Update public/index.html

See merge request geovistoogsi/ar!80

Update public/index.html

See merge request !79

Update public/index.html

See merge request !78

Update public/index.html

See merge request !77

Update public/index.html

See merge request !76

Update public/index.html

See merge request !75

Update public/index.html

See merge request !74

Update public/index.html

See merge request !73

Update public/index.html

See merge request !72

Update public/index.html

See merge request !71

Update public/index.html

See merge request !70

Update public/index.html

See merge request !69

Update public/index.html

See merge request geovistoogsi/ar!68