Add opacity slider for colour chooser in 2.5D renderer

[qgib]

Author Name: Nikolay Lebedev (Nikolay Lebedev)
Original Redmine Issue: 14877

Redmine category:symbology

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For now roof, wall and shadow colors for 2.5D renderer can’t be made transparent. I thought a standard color chooser is used for colors there, but it’s missing opacity slider. That should be quite handy when rendering buildings.

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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Fixed in changeset "7af95b10a0e3e4946940dfb0cb85486ff992e608".

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• status_id was changed from Open to Closed

[qgib]

Author Name: Nikolay Lebedev (Nikolay Lebedev)

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Checked that transparency commit. It mostly works, but when Shade walls based on aspect checkbox is turned on, wall opacity can’t be changed. I guess wall color get's calculated in that case, and opacity value doesn't get applied to the calculated colour.
Reopen?