Two little bug fixes. 1. fslview frame was crashing for view panels which

do not have config options, but also do not have a config menu item
name. 2. Conflicting fslview cli args - -a[lpha] and -a[xis]. Latter
changed to -ax.

fsl/fslview/fslviewframe.py

@@ -104,12 +104,10 @@ class FSLViewFrame(wx.Frame):
         allowing the user to configure the view.
         """
 
-        title    = strings.viewPanelTitles[        panelCls]
-        menuText = strings.viewPanelConfigMenuText[panelCls]
-
-        panel    = panelCls(self._centrePane,
-                            self._imageList,
-                            self._displayCtx) 
+        title = strings.viewPanelTitles[panelCls]
+        panel = panelCls(self._centrePane,
+                         self._imageList,
+                         self._displayCtx) 
 
         self._viewPanelCount = self._viewPanelCount + 1
         title = '{} {}'.format(title, self._viewPanelCount)
@@ -122,6 +120,8 @@ class FSLViewFrame(wx.Frame):
             wx.RIGHT)
 
         if panel.hasConfigOptions():
+
+            menuText     = strings.viewPanelConfigMenuText[panelCls]
             menuText     = menuText.format(title)
             configAction = self._viewMenu.Append(wx.ID_ANY, menuText)
         

fsl/tools/fslview_parseargs.py

@@ -78,7 +78,7 @@ def _configMainParser(mainParser):
               'zrange',
               'showGridLines',
               'zax']
-    lbArgs = ['ss', 'nc', 'nr', 'zr', 'sg', 'a']
+    lbArgs = ['ss', 'nc', 'nr', 'zr', 'sg', 'ax']
 
     # Use the properties module to automatically generate
     # arguments - property labels and help strings are