Re-enable DPS graph and make few fixes

gui/builtinGraphs/__init__.py

@@ -1,6 +1,6 @@
 # noinspection PyUnresolvedReferences
 from gui.builtinGraphs import (  # noqa: E402,F401
-    # fitDamageStats,
+    fitDamageStats,
     # fitDmgVsTime,
     # fitShieldRegenVsShieldPerc,
     # fitShieldAmountVsTime,

gui/builtinGraphs/base.py

@@ -96,8 +96,7 @@ class Graph(metaclass=ABCMeta):
             self._cache.clear()
         elif key in self._cache:
             del self._cache[key]
-        for yDef in self.yDefs:
-            getattr(self, yDef.eosGraph).clearCache(key=key)
+        self._eosGraph.clearCache(key=key)
 
 
 YDef = namedtuple('YDef', ('handle', 'unit', 'label'))

gui/graphFrame/frame.py

@@ -206,7 +206,7 @@ class GraphFrame(wx.Frame):
         fits = self.ctrlPanel.fits
         if view.hasTargets:
             targets = self.ctrlPanel.targets
-            iterList = tuple(itertools.combinations(fits, targets))
+            iterList = tuple(itertools.product(fits, targets))
         else:
             iterList = tuple((f, None) for f in fits)
         for fit, target in iterList: