[ui] ImageGallery: Re-parse intrinsics as soon as they are updated

When setting a temporary CameraInit node, the intrinsics of the actual
CameraInit node are used, meaning that the temporary CameraInit has all
the intrinsics information we need to fill the intrinsics table.

However, when a temporary CameraInit node is set, the parsing of the
intrinsics and the model update are not performed. If the active CameraInit
group does not change, this is not directly visible as the table keeps on
displaying the intrinsics from the actual CameraInit node.

If the active group changes, we attempt to fill the table with the
intrinsics of the temporary CameraInit node, which is being re-set for the
active group. The intrinsics are thus not available, leading to an empty
table, and the parsing is never retriggered once the temporary CameraInit
has been fully set.

Instead of re-parsing the intrinsics when the CameraInitIndex is updated,
the parsing is triggered when the intrinsics are updated, since this
ensures they will be available and its covers all the cases we could
be facing.

meshroom/ui/qml/ImageGallery/ImageGallery.qml

@@ -44,19 +44,18 @@ Panel {
         onViewpointsChanged: {
             ThumbnailCache.clearRequests();
         }
+
+        onIntrinsicsChanged: {
+            parseIntr()
+        }
     }
 
     property variant parsedIntrinsic
     property int numberOfIntrinsics : m.intrinsics ? m.intrinsics.count : 0
-
     onNumberOfIntrinsicsChanged: {
         parseIntr()
     }
 
-    onCameraInitIndexChanged: {
-        parseIntr()
-    }
-
     function changeCurrentIndex(newIndex) {
         _reconstruction.cameraInitIndex = newIndex
     }