Eesschema, dialog rescue: enhancements:

- Slightly change the info text in the dialog. Add a definition of  exactly what it means to "rescue" a component.
- Reload the project libraries when a project is opened, even if kicad  is already running and the same project is open (to be sure the lib cache is up to date).
- Set the Modified flag on cancel, because a change has indeed been  made (choosing not to rescue is equivalent to updating the components)

eeschema/dialogs/dialog_rescue_each.cpp

@@ -84,8 +84,9 @@ DIALOG_RESCUE_EACH::DIALOG_RESCUE_EACH( SCH_EDIT_FRAME* aParent, RESCUER& aRescu
     wxString info_message =
         _( "It looks like this project was made using older schematic component libraries.\n"
            "Some parts may need to be relinked to a different symbol name, and some symbols\n"
-           "may need to be \"rescued\" into a new library.\n"
-           "The following changes are recommended to update the project.\n" );
+           "may need to be \"rescued\" (cloned and renamed) into a new library.\n"
+           "\n"
+           "The following changes are recommended to update the project." );
     m_lblInfo->SetLabel( info_message );
 }
 

eeschema/files-io.cpp

@@ -4,7 +4,7 @@
  * Copyright (C) 2013 Jean-Pierre Charras, jp.charras at wanadoo.fr
  * Copyright (C) 2013 Wayne Stambaugh <stambaughw@verizon.net>
  * Copyright (C) 2013 CERN (www.cern.ch)
- * Copyright (C) 1992-2013 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2015 KiCad Developers, see AUTHORS.txt for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -285,6 +285,7 @@ bool SCH_EDIT_FRAME::OpenProjectFiles( const std::vector<wxString>& aFileSet, in
     // event handler in there.
     // And when a schematic file is loaded, we need these libs to initialize
     // some parameters (links to PART LIB, dangling ends ...)
+    Prj().SetElem( PROJECT::ELEM_SCH_PART_LIBS, NULL );
     Prj().SchLibs();
 
     if( is_new )

eeschema/project_rescue.cpp

@@ -330,7 +330,7 @@ public:
             wxString part_name( each_component->GetPartName() );
 
             LIB_PART* cache_match = find_component( part_name, aRescuer.GetLibs(), /* aCached */ true );
-            LIB_PART* lib_match = find_component( part_name, aRescuer.GetLibs(), /* aCached */ false );
+            LIB_PART* lib_match = aRescuer.GetLibs()->FindLibPart( part_name );
 
             // Test whether there is a conflict
             if( !cache_match || !lib_match )
@@ -515,6 +515,10 @@ bool SCH_EDIT_FRAME::RescueProject( bool aRunningOnDemand )
     {
         wxMessageDialog dlg( this, _( "No symbols were rescued." ) );
         dlg.ShowModal();
+
+        // Set the modified flag even on Cancel. Many users seem to instinctively want to Save at
+        // this point, due to the reloading of the symbols, so we'll make the save button active.
+        OnModify();
         return true;
     }