Xpra: Ticket #2625: bug report tool save file failed gives no feedback

From #2621

Overwriting an existing file:

a) Gives no "are you sure?" prompt (I am guessing it could be a "file navigator" feature? If not, and it's too much for you, don't bother)

b) Does not raise visually this

Traceback (most recent call last):
  File "E:\Xpra\trunk\src/xpra/client/gtk_base/bug_report.py", line 313, in save_clicked
  File "E:\Xpra\trunk\src/xpra/gtk_common/gtk_util.py", line 734, in choose_file
  File "E:\Xpra\trunk\src/xpra/client/gtk_base/bug_report.py", line 322, in do_save
  File "C:/msys64/mingw64/lib/python3.8/zipfile.py", line 1251, in __init__
PermissionError: [Errno 13] Permission denied: 'C:\\Users\\user-win\\Desktop\\test.zip'

I am on the terminal and I saw it; I don't think anything would happen if there was no terminal.

Sat, 07 Mar 2020 08:19:53 GMT - Antoine Martin: attachment set

new warning dialog

Sat, 07 Mar 2020 08:23:24 GMT - Antoine Martin: status changed; resolution set

Done in r25537.

Looks like this: new warning dialog

Sat, 07 Mar 2020 08:26:09 GMT - Antoine Martin: summary changed

Sat, 23 Jan 2021 05:56:22 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2625