related to #1787
**Todo:**
- [x] Use the real recent files list and allow opening with double click or enter
- [x] Redirect links for contribute and fund to our website
- [x] Handle the don't show checkbox, and add an option in the Kdenlive settings to show it again
- [x] Show a simplified splash only qml if user doesn't want the welcome screen
- [x] Don't show welcome screen if the user is opening a project from command line or file browser
- [ ] What shall we show if there is no recent projects
**Maybe**
- [x] Display modified date for recent projects
- [ ] Display thumbnail / screenshot for recent projects
