Load from Template: multiselect+Delete

[Yuri05]

While loading building block from template, it's possible to multiselect >1 BBs.
However after right mouse click only 1 item remains selected ==> deleting multiple building blocks not possible.

[msevestre]

Is this really that urgent that we need to do it in 7.4??

[Yuri05]

would be nice but not that urgent, can be done later

[PavelBal]

Must be ajdusted to the current template concept.