When you want to save a mail attachment (e.g. a picture file) from a mail to a folder in the system's folder hierarchy  you get a fully operable dialog window - with configuration options in the upper right corner and navigation arrows, .... In this dialog double clicks on folders work and open these folders which gives you a handy, quick and reliable method to navigate to the target folder. 

However, when you mark several (!) attachment files  for saving to disk you open a different dialog window which is reduced in its options (no configuration bar on the upper right; no navigation arrows ). In this hampered dialog window double clicks on folders to not work - it is an awful procedure to navigate.  Furthermore you cannot place folders into  the left overview list of places on the system. 

This is wrong and did not happen in versions 4.14 and 4.15 of kmail2. 


Reproducible: Always

Steps to Reproduce:
1. Open a mail with several attachments 
2. Go to the mail structure view 
3. Mark all attachment files 
4. right click =>  save 
5. Watch the hampered dialog window that opens (no configuration options, no navigation icons , no double clicks working on folders)

Actual Results:  
You get a different and reduced dialog windows than in a situation where you just choose one attachment file for saving to disk. The dialog for choosing the target folder where you want to save the attachment does not allow for normal navigation.    

Expected Results:  
The same dialog window (with configuration options, navigation icons, double clicks working) as in the situation where you just save one (!) attachment should appear.