Fix missed redraw on batch xf change (#5926)

Author: Grantim

source/MRMesh/MRObject.cpp

@@ -194,6 +194,14 @@ void Object::resetXf( ViewportId id )
     needRedraw_ = true;
 }
 
+void Object::setXfsForAllViewports( ViewportProperty<AffineXf3f> xf )
+{
+    if ( xf_ == xf )
+        return;
+    xf_ = std::move( xf );
+    needRedraw_ = true;
+}
+
 AffineXf3f Object::worldXf( ViewportId id, bool * isDef ) const
 {
     auto xf = xf_.get( id, isDef );

source/MRMesh/MRObject.h

@@ -112,7 +112,7 @@ class MRMESH_CLASS Object : public ObjectChildrenHolder
     /// returns xfs for all viewports, combined into a single object
     const ViewportProperty<AffineXf3f> & xfsForAllViewports() const { return xf_; }
     /// modifies xfs for all viewports at once
-    virtual void setXfsForAllViewports( ViewportProperty<AffineXf3f> xf ) { xf_ = std::move( xf ); }
+    MRMESH_API virtual void setXfsForAllViewports( ViewportProperty<AffineXf3f> xf );
 
     /// this space to world space transformation for default or specific viewport
     /// \param isDef receives true if the object has default transformation in this viewport (same as worldXf() returns)

source/MRMesh/MRViewportProperty.h

@@ -18,6 +18,7 @@ class ViewportProperty
 public:
     ViewportProperty() = default;
     ViewportProperty( const T& def ) :def_{ def } {}
+    bool operator==( const ViewportProperty& ) const = default;
     /// sets default property value
     void set( T def ) { def_ = std::move( def ); }
     /// gets default property value