Fix configure_subplots with tool manager

`configure_subplots` requires a) an object from which it can get the
`canvas` property, and b) somewhere it can store its handle for re-use.

The pseudo-toolbar that is used for most `Tool` classes is temporary and
does not provide the latter. However, tools inherit from `ToolBase`
which contains a `canvas` property and they exist for the lifetime of
the toolbar, so can be used instead.

Fixes matplotlib#22088

Author: QuLogic

lib/matplotlib/backends/_backend_gtk.py

@@ -295,8 +295,7 @@ def remove_rubberband(self):
 
 class ConfigureSubplotsGTK(backend_tools.ConfigureSubplotsBase):
     def trigger(self, *args):
-        _NavigationToolbar2GTK.configure_subplots(
-            self._make_classic_style_pseudo_toolbar(), None)
+        _NavigationToolbar2GTK.configure_subplots(self, None)
 
 
 class _BackendGTK(_Backend):

lib/matplotlib/backends/_backend_tk.py

@@ -934,8 +934,7 @@ def trigger(self, *args):
 @backend_tools._register_tool_class(FigureCanvasTk)
 class ConfigureSubplotsTk(backend_tools.ConfigureSubplotsBase):
     def trigger(self, *args):
-        NavigationToolbar2Tk.configure_subplots(
-            self._make_classic_style_pseudo_toolbar())
+        NavigationToolbar2Tk.configure_subplots(self)
 
 
 @backend_tools._register_tool_class(FigureCanvasTk)

lib/matplotlib/backends/backend_qt.py

@@ -985,9 +985,12 @@ def set_message(self, s):
 
 @backend_tools._register_tool_class(FigureCanvasQT)
 class ConfigureSubplotsQt(backend_tools.ConfigureSubplotsBase):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._subplot_dialog = None
+
     def trigger(self, *args):
-        NavigationToolbar2QT.configure_subplots(
-            self._make_classic_style_pseudo_toolbar())
+        NavigationToolbar2QT.configure_subplots(self)
 
 
 @backend_tools._register_tool_class(FigureCanvasQT)

lib/matplotlib/backends/backend_wx.py

@@ -1242,8 +1242,7 @@ def set_message(self, s):
 @backend_tools._register_tool_class(_FigureCanvasWxBase)
 class ConfigureSubplotsWx(backend_tools.ConfigureSubplotsBase):
     def trigger(self, *args):
-        NavigationToolbar2Wx.configure_subplots(
-            self._make_classic_style_pseudo_toolbar())
+        NavigationToolbar2Wx.configure_subplots(self)
 
 
 @backend_tools._register_tool_class(_FigureCanvasWxBase)