[partition] Follow 'claimed' settings for claiming swap

- By the time the GS is actually written, new (for partition state)
  is always false. So "new" is the wrong thing to track. It should
  have had a better name anyway,
- We store custom properties on the partition objects to indicate
  what happens to them; use those properties (instead of state,
  as done originally), call it "claimed" to indicate that the partition
  is part of this installation.

For now, only new (as in, formatted, created-by-us) partitions are
claimed.

- The effect here is that only "new" swap will be added to the system,
  so in erase-disk installations, or manual partitioning.
- Install-alongside and replace will now **not** claim the swap already
  on the disk; I think we'll need another UI knob for that one.

FIXES #1316

src/modules/partition/core/PartitionCoreModule.h

@@ -224,10 +224,10 @@ public:
      */
     QList< SummaryInfo > createSummaryInfo() const;
 
-    void dumpQueue() const; // debug output
-
     const OsproberEntryList osproberEntries() const;    // os-prober data structure, cached
 
+    void dumpQueue() const; // debug output
+
 Q_SIGNALS:
     void hasRootMountPointChanged( bool value );
     void isDirtyChanged( bool value );