[LVGL] Support 'OR'ed properties

[arturo182]

Some properties in LVGL are actually a bit mask and allow for a little flexibility in how they are set.

One such property is Border Side, you can have a border on the Left, or on the Top, but also on the Left AND the Top. Another such property is Text Decoration, there might be more.

At the moment EEZ Studio has a fixed list of possible values for those properties and doesn't allow for full flexibility:

As for how this could be solved, for example in Qt, they have a collapsible list of checkboxes that create the ORed mask:

It would be great if this found its way to EEZ Studio at some point 🙂

Thanks!

[mvladic]

Implemented for the "Border side" and "Text decoration":

[arturo182]

Thank you :)