Load correct schematic page layout description file in stand alone mode.

Fixes lp:1678849

https://bugs.launchpad.net/kicad/+bug/1678849

eeschema/files-io.cpp

@@ -249,8 +249,6 @@ bool SCH_EDIT_FRAME::OpenProjectFiles( const std::vector<wxString>& aFileSet, in
     SetStatusText( wxEmptyString );
     ClearMsgPanel();
 
-    LoadProjectFile();
-
     // PROJECT::SetProjectFullName() is an impactful function.  It should only be
     // called under carefully considered circumstances.
 
@@ -274,6 +272,8 @@ bool SCH_EDIT_FRAME::OpenProjectFiles( const std::vector<wxString>& aFileSet, in
         Prj().SchLibs();
     }
 
+    LoadProjectFile();
+
     // Load the symbol library table, this will be used forever more.
     Prj().SetElem( PROJECT::ELEM_SYMBOL_LIB_TABLE, NULL );
     Prj().SchSymbolLibTable();