Feature request: Select parts by group or tag in schematic and board

[katyo]

I think that feature pretty helpful while developing complex devices.
In particular I often needed select all other parts with same group with selected parts to move it together (in schematic and on board) or duplicate (in schematic).

[carrotIndustries]

select all other parts with same group with selected parts to move it together (in schematic and on board) or duplicate (in schematic).

The naive implementation would just select the symbols in the schematic. I think we'd also have to select all connected net lines, junctions and tracks for this feature to be useful.