IDLE: closing "Go to Line" on OS X 3.7 activates wrong window

[eamartin]

BPO	34281
Nosy	@terryjreedy
Superseder	bpo-34120: IDLE: Freeze when closing Settings (& About) dialog on MacOS

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/terryjreedy'
closed_at = <Date 2018-07-31.02:34:21.240>
created_at = <Date 2018-07-30.13:06:36.810>
labels = ['expert-IDLE', 'type-bug', '3.7']
title = 'IDLE: closing "Go to Line" on OS X 3.7 activates wrong window'
updated_at = <Date 2018-07-31.02:34:21.238>
user = 'https://bugs.python.org/eamartin'

bugs.python.org fields:

activity = <Date 2018-07-31.02:34:21.238>
actor = 'terry.reedy'
assignee = 'terry.reedy'
closed = True
closed_date = <Date 2018-07-31.02:34:21.240>
closer = 'terry.reedy'
components = ['IDLE']
creation = <Date 2018-07-30.13:06:36.810>
creator = 'eamartin'
dependencies = []
files = []
hgrepos = []
issue_num = 34281
keywords = []
message_count = 3.0
messages = ['322673', '322697', '322711']
nosy_count = 2.0
nosy_names = ['terry.reedy', 'eamartin']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '34120'
type = 'behavior'
url = 'https://bugs.python.org/issue34281'
versions = ['Python 3.7']

[eamartin]

After entering a line number, clicking OK brings to the foreground and makes active the first hidden window (in the simplest case where we have just one window for a .py file and the Shell window, the former being in the foreground, clicking OK brings the Shell window to the foreground).

[terryjreedy]

I suspect that this results from a problem with the new tkinter/tcl/tk8.6 delivered with 3.7. See bpo-34275.

[terryjreedy]

After doing some experiments, I decided that this is the same issue with a different window.