Switch default for /org/ladish/daemon/terminal to xterm

x-terminal-emulator, while good in theory is debian specific.
xterm, OTOH is ubiquitous and minimal.

Fix for https://github.com/falkTX/Cadence/issues/361

src/shared_settings.py

@@ -56,7 +56,7 @@ LADISH_CONF_KEY_DAEMON_JS_SAVE_DELAY    = "/org/ladish/daemon/js_save_delay"
 # LADISH defaults
 LADISH_CONF_KEY_DAEMON_NOTIFY_DEFAULT           = True
 LADISH_CONF_KEY_DAEMON_SHELL_DEFAULT            = "sh"
-LADISH_CONF_KEY_DAEMON_TERMINAL_DEFAULT         = "x-terminal-emulator"
+LADISH_CONF_KEY_DAEMON_TERMINAL_DEFAULT         = "xterm"
 LADISH_CONF_KEY_DAEMON_STUDIO_AUTOSTART_DEFAULT = True
 LADISH_CONF_KEY_DAEMON_JS_SAVE_DELAY_DEFAULT    = 0