Bug#837163: .xsession-errors

[Joysn71]

looking at .xsession-errors i get lots of messages like:

(marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn
without a current allocation. This should not happen.

(marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn
without a current allocation. This should not happen.
Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message
with a timestamp of 0 for 0x2600008 ()
Window manager warning: meta_window_activate called by a pager with a 0
timestamp; the pager needs to be fixed.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd4400. Allocation is 34x24, but minimum required size is
34x34.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd49a0. Allocation is 171x24, but minimum required size is
171x387.

(marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn
without a current allocation. This should not happen.

(marco:21606): Gtk-WARNING **: MetaFrames 0x55723837d180 is drawn
without a current allocation. This should not happen.

(caja:23056): Gtk-WARNING **: Theme parsing error: <data>:1:51: The
style property GtkStatusbar:shadow-type is deprecated and shouldn't be
used anymore. It will be removed in a future version

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd4400. Allocation is 34x24, but minimum required size is
34x34.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd47c0. Allocation is 791x24, but minimum required size is
985x24.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate MatePanelAppletFrameDBus's child
MatePanelAppletContainer 0x558f149b08e0. Allocation is 781x24, but
minimum required size is 975x24.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate MatePanelAppletContainer's child GtkSocket
0x558f14cd5680. Allocation is 781x24, but minimum required size is
975x24.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd49a0. Allocation is 171x24, but minimum required size is
171x387.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd4400. Allocation is 34x24, but minimum required size is
34x34.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd49a0. Allocation is 171x24, but minimum required size is
171x387.

(caja:23410): Gtk-WARNING **: Allocating size to GtkTable
0x5598a232a140 without calling gtk_widget_get_preferred_width/height().
How does the code know the size to allocate?
** Message: Initializing gksu extension...
Initializing caja-open-terminal extension

(caja:23410): Gtk-WARNING **: Allocating size to GtkTable
0x5598a232a140 without calling gtk_widget_get_preferred_width/height().
How does the code know the size to allocate?

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd4400. Allocation is 34x24, but minimum required size is
34x34.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd49a0. Allocation is 171x24, but minimum required size is
171x387.

(caja:23410): Gtk-WARNING **: Allocating size to GtkTable
0x5598a232a140 without calling gtk_widget_get_preferred_width/height().
How does the code know the size to allocate?

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd4400. Allocation is 34x24, but minimum required size is
34x34.

(mate-panel:21619): Gtk-WARNING **: gtk_widget_size_allocate(): attempt
to underallocate PanelWidget's child MatePanelAppletFrameDBus
0x558f14cd49a0. Allocation is 171x24, but minimum required size is
171x387.