23061: [CEA 1488] Import 1D-2D fails sometimes in relation with the source face discr...

23061: [CEA 1488] Import 1D-2D fails sometimes in relation with the source face discretization
  Fix SMESH_subMesh::ComputeStateEngine() and StdMeshers_Import_1D2D::Compute()

IPAL52572: 1) Wrong bi-quadratic mesh on cylinder, 2) global "Quadratic mesh" hyp not considered on Propagated edges.
  Fix SMESH_MesherHelper::FixQuadraticElements()
  StdMeshers_Regular_1D - wrong PropagationOfDistribution in quadratic mesh

In SMESHGUI_MergeDlg, disable [Detect] if no mesh selected