Fix 11 Maintainability issues in tkinter (updated).py

[Sapt-pal]

CodeFactor found multiple issues last seen at 841d59c:

Global variable 'window_up' undefined at the module level

• tkinter (updated).py:333

Global variable 'pw' undefined at the module level

• tkinter (updated).py:281

Global variable 'window_view' undefined at the module level

• tkinter (updated).py:271

Global variable 'password_custom' undefined at the module level

• tkinter (updated).py:194

Global variable 'username' undefined at the module level

• tkinter (updated).py:193

Global variable 'url' undefined at the module level

• tkinter (updated).py:192

Global variable 'window_cust' undefined at the module level

• tkinter (updated).py:190

Global variable 'choice' undefined at the module level

• tkinter (updated).py:146

Global variable 'window_rand' undefined at the module level

• tkinter (updated).py:119

Global variable 'window_welc' undefined at the module level

• tkinter (updated).py:46

Using global for 'choice' but no assignment is done

• tkinter (updated).py:157