Photos imported in Shotwell
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Test that photos imported in Shotwell appear in the lens

Setup:
Have some photos imported in Shotwell

Actions:
1. Open the Dash and switch to the photos lens
2. Make sure the 100 most recently taken Shotwell imports are present

Expected Result:
The lens should display the 100 most recently taken Shotwell imports, 
50 in the Recent category, 50 in the My Photos category.
