Resets signon.rememberSignons preference to let the user choose

By disabling this preference, we prevented Thunderbird from even asking
whether passwords of new setup mail accounts should be saved or not.
This could be pretty confusing and not handy for daily usage.

Users with _specific_ needs can still unconditionally disable passwords
saving by uncommenting `5003`.

> closes #30

Co-Authored-By: atomGit <[email protected]>

user.js

@@ -1038,8 +1038,8 @@ user_pref("_user.js.parrot", "5000 syntax error: the parrot's taken 'is last bow
 user_pref("browser.cache.memory.enable", false);
 user_pref("browser.cache.memory.capacity", 0);
 /* 5003: disable saving passwords
- * [NOTE] This does not clear any passwords already saved ***/
-user_pref("signon.rememberSignons", false);
+ * [NOTE] This does not clear any already saved passwords and will make TB ask for it every time ***/
+   // user_pref("signon.rememberSignons", false);
 /* 5004: disable permissions manager from reading or writing to disk [FF41+] [RESTART]
  * [SETUP-CHROME] This means any permission changes (cookie or mail remote content) are session only
  * [1] https://bugzilla.mozilla.org/967812 ***/