Easy mode GUI

[Neverous]

Is there an existing issue for this?

• I have searched the existing issues

Description

Current GUI is a bit advanced (and will only get more complex with adding support for other EFI Boot Manager features).
Might be worth to implement some Easy mode/view that would display only basic/most used features (and make it default with current one hidden behind "Advanced" option?).

Additional information

Probably stuff like:

• just a simple list of boot entries by name
• File Path setting by choosing file on disk/device
• optional data manipulation only if deserialized to something nice / structured

[sschuberth]

Also, I find it currently hard to understand what determines the default entry. An easy mode should make it easy to configure the default entry.