Camera page refactoring

[GuLinux]

Usability improvements on camera page.

• Camera page should be similar as current one, possibly with a much smaller image. This though will be only used as a preview
• Clicking the image will open it in full screen, without the side menu or other widgets. There should be only a fixed top action bar, mainly for adjusting viewing options
• here you should also be able to zoom freely the image, and both horizontal and vertical navigation should be improved