EomWindow: Switch keyboard shortcuts for sidebar and gallery

This makes eom behave the same as other MATE apps,
like Caja and pluma.

inspired by:
https://gitlab.gnome.org/GNOME/eog/commit/af2c96

src/eom-window.c

@@ -3729,10 +3729,10 @@ static const GtkToggleActionEntry toggle_entries_window[] = {
	{ "ViewStatusbar", NULL, N_("_Statusbar"), NULL,
	  N_("Changes the visibility of the statusbar in the current window"),
	  G_CALLBACK (eom_window_cmd_show_hide_bar), TRUE },
	{ "ViewImageCollection", "eom-image-collection", N_("_Image Collection"), "F9",
	{ "ViewImageCollection", "eom-image-collection", N_("_Image Collection"), "<control>F9",
	  N_("Changes the visibility of the image collection pane in the current window"),
	  G_CALLBACK (eom_window_cmd_show_hide_bar), TRUE },
	{ "ViewSidebar", NULL, N_("Side _Pane"), "<control>F9",
	{ "ViewSidebar", NULL, N_("Side _Pane"), "F9",
	  N_("Changes the visibility of the side pane in the current window"),
	  G_CALLBACK (eom_window_cmd_show_hide_bar), TRUE },
};