Make main menu icon configurable and add nice default

assets/icons/material-tux-dark-keen.svg

@@ -0,0 +1,121 @@
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default_theme.lua

@@ -159,6 +159,7 @@ theme.layout_cornersw = themes_path.."default/layouts/cornersww.png"
 theme.layout_cornerse = themes_path.."default/layouts/cornersew.png"
 
 -- Generate Awesome icon:
+theme.start_menu_icon = simple_awesome_path .. "/assets/icons/material-tux-dark-keen.svg"
 theme.awesome_icon = theme_assets.awesome_icon(
     theme.menu_height, theme.bg_focus, theme.fg_focus
 )

simple/init.lua

@@ -163,7 +163,7 @@ hotkey.registerKeys(hotkey.make(config.keys.global_keys.lock_screen, lockScreen,
 -- Launcher (start menu)
 --
 local launcher = awful.widget.button({
-    image = beautiful.awesome_icon,
+    image = beautiful.start_menu_icon,
 })
 launcher:buttons(gears.table.join(launcher:buttons(),
     awful.button({}, 1, nil, function() showAppLauncher(false) end)))