Typo-bugfixes in PlotControlPanel on overlay name change. Fixed bug in

PlotPanel auto-limit calculation.

fsl/fsleyes/controls/plotcontrolpanel.py

@@ -349,12 +349,12 @@ class PlotControlPanel(fslpanel.FSLEyesPanel):
         if self.__widgets.HasGroup('currentDSSettings'):
             self.__widgets.RenameGroup(
                 'currentDSSettings',
-                strings.labels[self, 'currentDSettings'].format(display.name))
+                strings.labels[self, 'currentDSSettings'].format(display.name))
         
         if self.__widgets.HasGroup('customDSSettings'):
             self.__widgets.RenameGroup(
                 'customDSSettings',
-                strings.labels[self, 'customDSettings'].format(display.name)) 
+                strings.labels[self, 'customDSSettings'].format(display.name)) 
 
     
     def __selectedOverlayChanged(self, *a):

fsl/fsleyes/views/plotpanel.py

@@ -399,6 +399,11 @@ class PlotPanel(viewpanel.ViewPanel):
 
         for ds in toPlot:
             xlim, ylim = self.__drawOneDataSeries(ds, preproc, **plotArgs)
+
+            if (xlim[1] - xlim[0] < 0.0000000001) or \
+               (ylim[1] - ylim[0] < 0.0000000001):
+                continue
+            
             xlims.append(xlim)
             ylims.append(ylim)