When I receive an email with many different attachments and want to delete one after the other, KMail skips to the next email in the inbox folder after I deleted an attachment. This makes me select again the E-Mail I had opened before to delete the next attachment.

Reproducible: Always

Actual Results:  
Receive an E-Mail with more than one attachment. This can be a number of pictures, a business mail with a company logo and other boilerplate stuff which is sent as an attachment, or several documents. 
I usually save the attachments outside KMail and then delete them from the E-Mails. This is when the tedious process begins.

Expected Results:  
Expected behavior in order from least to most preferred: 
KMail keeps the current E-Mail selected so I can open it with one click, or 
KMail does not close the current E-Mail so that the next attachment can immediately be selected for deletion, or
KMail allows to select more than one attachment to be deleted simultaneously (most preferred).