allow for improved more efficient creation of target folders in the "create filters from messages" process

[JLSOAZ]

"Create Filters From Messages" can be somewhat time consuming, but is very important to some of us.

I suggest in order to cut down on this time consumption that we make it easier to create the new folders that the create filters process often requires.  I can think of two ways:
- have a new option of "Create Filters From Messages Including Automated New Target Folder Creation"
or (more time consuming, but still somewhat of an improvement):
- allow for creating new target folders from within the existing Create Filters From Messages screen. 

Both of these would help the user having to go through the process of creating new folders in advance of creating new filters.

[Jon]

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