[kmail2] [Bug 405224] New: KMail/Kontact mail list refreshed on (de)activation

[Mykola Krachkovsky]

https://bugs.kde.org/show_bug.cgi?id=405224

            Bug ID: 405224
           Summary: KMail/Kontact mail list refreshed on (de)activation
           Product: kmail2
           Version: unspecified
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: message list
          Assignee: kdepim-bugs at kde.org
          Reporter: w01dnick at gmail.com
  Target Milestone: ---

SUMMARY
Each time main KMail/Kontact window is activated or deactivated its mail list
is refreshed and currently selected mail is lost.

STEPS TO REPRODUCE
1. Open some mail directory (and keep in mind which mail was selected).
2. Select one or other mail (not the same which was selected on directory
switch).
3. Switch to another app, for example Alt+F2 (Alt+Space) to run KRunner, that
doesn't matter.

OBSERVED RESULT
I. Current directory content list is refreshed.
II. Selected mail switches back to that from step 1.
(NB Selected mail is kept on switching mail directory)

EXPECTED RESULT
I. I can't see a reason to refresh list on activation/deactivation, though
maybe I'm wrong and there is some reason. But flashing to empty and showing
list again doesn't look good.
II. At least selected mail should be kept on deactivation/activation.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE Tumbleweed (snapshot 20190305).
KDE Plasma Version: 5.15.2
KDE Applications Version: 18.12.2
KDE Frameworks Version: 5.55.0
Qt Version: 5.12.0
KMail/Kontact Version: 5.10.2
(XCB, not wayland)

ADDITIONAL INFORMATION
This strange behaviour might be (might be not) a trigger for next bugs:
https://bugs.kde.org/show_bug.cgi?id=405122
https://bugs.kde.org/show_bug.cgi?id=405220

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