SlotsLayout padding grouped property needs to assigned member-by-member, can't be assigned as a whole

[Marco Trevisan (Treviño)]

ubuntu-ui-toolkit/staging branch, r2139

At the moment to assign paddings of a SlotsLayout you can only do:
SlotsLayout {
  id: myLayout
  padding.top: units.gu(15)
  padding.bottom: units.gu(5)
}

Assigning the whole padding at once is not possible:
SlotsLayout {
  padding: myLayout.padding
}
as that returns an error:

Slots.qml: Invalid property assignment: "padding" is a read-only property
So to achieve this we need to manually assign the subvalues.

It would be nice to do it all at once.

[Andrea Bernabei (faenil)]

Thanks Marco!
That makes sense, I'll have a look at that next week!