Bulk resources operations about ark-navigator HOT 4 CLOSED

Selection should be possible by either:

• specifying resources by one with long-tap
• using special button "select" in the toolbar, which allows to draw rectangle to select resource

After 1 or more resources selected, pop-up menu with operations must be possible to call.

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Operations to support:

• sharing
• moving to another folder, migrate tags as well
• deletion
• labeling with a tag (maybe it's even possible to remove a tag shared among all of selected resources)

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#281 implement core of this functionality
But we still need:

• sharing
• labeling with a tag

Advanced feature (not sure if it's needed):

• remove a tag shared among all of selected resources

Also we need to double-check later that tags migrate with resources into another root.

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Continuation of work: #292

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