IDLE, configdialog, General tab: re-arrange, test user entries

GitHub fields:

assignee = 'https://github.com/terryjreedy'
closed_at = None
created_at = <Date 2017-07-26.20:26:38.041>
labels = ['expert-IDLE', 'type-bug', '3.7']
title = 'IDLE, configdialog, General tab: re-arrange, test user entries'
updated_at = <Date 2017-08-30.06:47:29.643>
user = 'https://github.com/terryjreedy'

bugs.python.org fields:

activity = <Date 2017-08-30.06:47:29.643>
actor = 'terry.reedy'
assignee = 'terry.reedy'
closed = False
closed_date = None
closer = None
components = ['IDLE']
creation = <Date 2017-07-26.20:26:38.041>
creator = 'terry.reedy'
dependencies = []
files = []
hgrepos = []
issue_num = 31051
keywords = []
message_count = 11.0
messages = ['299262', '299263', '299264', '299265', '299606', '299631', '299683', '301006', '301007', '301009', '301013']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'louielu', 'cheryl.sabella', 'wohlganger']
pr_nums = ['3239', '3240']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue31051'
versions = ['Python 3.6', 'Python 3.7']