Fix StIcon's fallback-gicon property
Commit 3dd8ffc2 broke the property, as any icon is now "found" as long as we have the missing-image
icon.
Fix this by reverting the commit, and implementing the fallback-fallback behavior in StIcon instead.
Commit 3dd8ffc2 broke the property, as any icon is now "found" as long as we have the missing-image
icon.
Fix this by reverting the commit, and implementing the fallback-fallback behavior in StIcon instead.