Add marching ants to selected composer items

[qgib]

Author Name: Nathan Woodrow (@NathanW2)
Original Redmine Issue: 7793

Redmine category:map_composer/printing
Assignee: Nyall Dawson

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The marching ants look that photoshop and a lot of other graphics programs use is quite handy to see what is selected. I think something like this would be good to have on the composer items.

Marching ants for those that don't know

[qgib]

Author Name: Nathan Woodrow (@NathanW2)

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• fixed_version_id was configured as Future Release - High Priority
• category_id was configured as Map Composer/Printing
• tracker_id was changed from 1 to 2

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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I'm planning on rewriting the item selection code for 2.1.0 - it's got some shortcomings at the moment, like handles hiding behind objects, and transparency & blend modes being applied to handles. I'll take a look at this then!

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• assigned_to_id was configured as Nyall Dawson

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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Fixed in changeset "24d110606c9fa58e57feed337dd2ded0af4eaa8f".

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• status_id was changed from Open to Closed