[Bug 302546] New: Creating Search folder for new mails and activating "mark as read after" misbehaves

[PhobosK]

https://bugs.kde.org/show_bug.cgi?id=302546

            Bug ID: 302546
          Severity: normal
           Version: 4.8.4
          Priority: NOR
          Assignee: kdepim-bugs at kde.org
           Summary: Creating Search folder for new mails and activating
                    "mark as read after" misbehaves
    Classification: Unclassified
                OS: Linux
          Reporter: phobosk at fastmail.fm
          Hardware: Ubuntu Packages
            Status: UNCONFIRMED
         Component: folders
           Product: kmail2

Creating a Search folder for filtering/searching new mails and having the
option "mark as read after * sec." is misbehaving, rendering the search folder
useless. By "Misbehaving" i mean that the moment you click on a message and it
is marked as read, it disappears from the list(no matter if it is selected or
not), which is an expected behavior, but in this particular case it is a wrong
one.

I have just migrated from Evolution, and they have this case resolved very
friendly (both in Evo 2.x and 3.x).
The same virtual folder (which  filters all new mail), when one selects the
message and it is marked as read, it stays in the folder till:
- if it is selected - always until you leave the folder
- if a new mail arrives AND the message is not selected
- if you leave the search folder 

Reproducible: Always

Steps to Reproduce:
1. Turn the option of "mark mail as read after ... sec" on. Lets say you make
it 0 sec so you can see what i am having in mind
2. Create a Search folder with the only condition to search for messages which
status is "Unread"
3. When couple of new messages arrive go to the search folder and select the
first message
Actual Results:  
All the messages will be selected one after another, marked read and
disappearing. They disappear no matter if a message is selected or not.

Expected Results:  
The messages to stay in that Search folder until:
- the user leaves the search folder
- if a message is selected - always to stay in the folder (until the folder is
left)
- if a message is not selected - remove from the folder when new mail arrives

A workaround this problem is NOT to check the "Mark messages as read after ...
sec", but this makes this option useless and one needs to mark every message as
read manually.

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