Headless and UI options can be selected simultaneously

Steps to reproduce (tested on Windows10/Edge)

• Start the wizard
• Auth/register
• Choose add-ons : un select all add ons
• select headless server
• select digital asset management

=> result : both headless and UI are slected cf. screenshot ; plus, clicking on "DAM" remove the headless selection (unexpected behavior)

=> Expected result :

• By default, Nuxeo UI is selected and default add-ons are selected (all except vision and live-connect)
• If headless is selected, UI is deselected AND every incompatible additional add-ons are deselected and disabled (especially templates rendering, ...).
• When UI is selected, default add-ons are re-selected
• if DAM add-on is not selected, Showcase content and Vision add-ons are disabled (and de-selected)
• if Template rendering is not selected, Template samples addon is disabled
• (optionnal / improvement) When clicking on a disabled add-on, a toaster message explains which add-on is required for the child add-on (dependency on design).