Fix "Mortar BC Set Diag Edges" functionality.


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6907 04224531-1f84-46d8-96ce-875b9e37dce3
Fix the case of nonexisting interface.


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6908 04224531-1f84-46d8-96ce-875b9e37dce3
For debugging reasons it is useful to see also the Jfix field and therefore the output for it by default was activated. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6909 04224531-1f84-46d8-96ce-875b9e37dce3
Minor fixes. The conformal discontinuous edge projector is now diagonal by default if the corresponding nodal projector is. 


git-svn-id: svn://svn.code.sf.net/p/elmerfem/code/trunk@6910 04224531-1f84-46d8-96ce-875b9e37dce3