feat(setup): create coherent private status bar

Using the same color for 'c.colors.statusbar.command.private.bg' and
'c.colors.statusbar.command.bg' assures coherence with other menus, like
'c.colors.completion.category.bg'. However, the overall coherence in
private mode is improved by matching
'c.colors.statusbar.command.private.bg' with
'c.colors.statusbar.private.bg'.

Author: trueNAHO

setup.py

@@ -294,7 +294,7 @@ def setup(c, flavour, samecolorrows = False):
     ## Foreground color of the statusbar in private browsing mode.
     c.colors.statusbar.private.fg = palette["subtext1"]
     ## Background color of the statusbar in private browsing + command mode.
-    c.colors.statusbar.command.private.bg = palette["base"]
+    c.colors.statusbar.command.private.bg = palette["crust"]
     ## Foreground color of the statusbar in private browsing + command mode.
     c.colors.statusbar.command.private.fg = palette["subtext1"]