Mark email with CTRL+SHIFT for more blocks

Hello,

I now, there is a similar topic:
https://forum.emclient.com/t/option-to-select-emails-with-ctrl-shift/75025

But 1. the problem is not really solved and 2. there is an additional problem.

What works well in Outlook or Thunderbird:
I mark email nr. 1. Then I hold CTRL+SHIFT and mark email nr. 4. All emails between 1 and 4 are marked.
I hold CTRL and mark email nr. 8. Then I hold CTRL+SHIFT and mark email nr. 12.
Now, all emails 1-4 AND all emails 8-12 are marked.
I used this function often to delete blocks of emails.

  1. Why it does not work in em client like in Outlook and Thunderbird? In em client I have to use only CTRL for one block - this is NOT standard.
  2. In em client, more blocks at once are not possible.