Bring back the multi-select function in Design Manager

[Wenyi]

For users who have two Hubspot accounts and try to transfer existing templates (blog, email, landing page) to a new account, the function to multi-select is a MUST. 

Hubspot use to have this feature, as indicated in this instruction; but now it is not enabled in the beta version of design manager.

Please bring this function back. 

[#2]

Hey there! You can actually do this by right clicking, or using shift to select entire sections, in the new design manager.