Update Tips and tricks documentation

[lfasani]

The aim is to update the Capella documentation to adapt and to highlight new features such as:

• new layout features (layout children, layout ports, "move pinned elements" ..)
• color management

[etraisnel2]

Seems like few links to deleted images were not properly cleaned up Can you fix it so the broken links junit passes ? https://ci.eclipse.org/capella/job/capella-product/job/master/505/