When "Show Entries of SubGroups" is checked, it would be very useful to toggle on/off the "group by SubGroup" appearance of the entries pane.
As a possible extension of this, it would be very useful to have the SubGroup name as a column in the entries pane.
The effect of this would be to allow global sorting across all SubGroups, which is not possible at the moment. SubGroups are in effect a quick categorisation method to make it easier to for users to locate entries without having to remember keywords to search by, but when searching or sorting it is often useful to sort the database as a whole (e.g. to allow identification of passwords that haven't been used for a long period of time, or the most recently used/modified entry).
Many possible use cases could be solved by having the ability to globally sort and display the database, (optionally with the SubGroup as a column instead of a grouping header within the entries pane).
This is related to:
1. Exclude Group names from Find Results - v2.11 tags - ID: 3018130
2. Sorting all entries flat for identifying conflicting entries - ID: 3514026