BF: Fold all toggle not working in Coder view

Looks like the signature to wx.stc.FoldAll has changed and now requires
the action to be named (STC_FOLDACTION_TOGGLE, STC_FOLDACTION_CONTRACT, or
STC_FOLDACTION_EXPAND)

Author: peircej

psychopy/app/coder/coder.py

@@ -2671,7 +2671,7 @@ def resetFont(self, event):
         self.currentDoc.resetFontSize()
 
     def foldAll(self, event):
-        self.currentDoc.FoldAll()
+        self.currentDoc.FoldAll(wx.stc.STC_FOLDACTION_TOGGLE)
 
     # def unfoldAll(self, event):
     #   self.currentDoc.ToggleFoldAll(expand = False)