Import image Sequence via single image drag+drop fails to prompt for sequence

[ianp5a]

User is trying to import image sequence using the 2 recommended modes
Method 1) Drag and image to the tree. Prompt will ask if entire folder should be imported
Method 2) Import a single image using File Import. . Prompt will ask if entire folder should be imported

The Problem: The prompt does not appear. Just the single image is imported.

Openshot 1.4.3 on Kubuntu 13.04

Note: Methods 1 and 2 use an unexpected and unsual interaction, offering poor discoverability for new users.
Suggestion. Use a standard method using a file browser.: The "Import Image Sequence" GUI should have a file browser added to let you navigate to the folder. From there the user can select a single file or click a "Use All" button. The Image sequence is then clear. That would avoid the need to fix this bug