Add 'Show Image' radio button in Tape, Create/Edit, Add Known dialog

[Susan Spencer]

Add 'Show Image' radio button in Tape, Create/Edit, Add Known dialog

The image can be closed by a close window 'x' in upper corner, or when another radio button is selected, the current image will close and the new image will appear.

This will help users if they have questions.

[Roman Telezhynskyi]

Resolved issue #380.

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