Juce::Grid::Item accept Grid/Rectangle as input for nesting grids

[chkn]

Cool idea. I made some similar request for FlexBox.

FR: FlexBox two little modifications -> huge improvement

I am a huge FlexBox fan, and with these two little changes, it would be super easy to create complex layouts, but at the same time keeps things in the logical position (like in html), in a SINGLE nested array. Allow FlexItems to embed another FlexBoxes per VALUE now FlexItem (FlexBox& flexBoxToControl) then FlexItem (FlexBox flexBoxToControl) (FlexBox needs to be stored internally) and allow adding Items directly in the FlexBox constructor FlexBox(Array<FlexItem> items) than something …