kivy tx dialog: move buttons out of scrollview

gui/kivy/uix/dialogs/tx_dialog.py

@@ -22,6 +22,8 @@ Builder.load_string('''
     status_str: ''
     description: ''
     outputs_str: ''
+    BoxLayout:
+        orientation: 'vertical'
         ScrollView:
             GridLayout:
                 height: self.minimum_height
@@ -75,8 +77,9 @@ Builder.load_string('''
                         Rectangle:
                             size: self.size
                             pos: self.pos
-            #Widget:
+
-            #    size_hint: 1, 0.2
+        Widget:
+            size_hint: 1, 0.1
 
         BoxLayout:
             size_hint: 1, None