[dolphin] [Bug 465838] New: Double separator line between tool area and view area (default color scheme breeze light)

[mrfrh]

https://bugs.kde.org/show_bug.cgi?id=465838

            Bug ID: 465838
           Summary: Double separator line between tool area and view area
                    (default color scheme breeze light)
    Classification: Applications
           Product: dolphin
           Version: 22.12.2
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: mrfrh at gmx.de
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 156299
  --> https://bugs.kde.org/attachment.cgi?id=156299&action=edit
double separator line vs. other kde apps

SUMMARY
Using the default color scheme breeze light, the upper (horizontal) border of
the dolphin view area is doubled up by the tool area separator line. This is
not consistent to other KDE apps (e.g. systemsettings, see attached
screenshot). From my personal point of view, this looks a bit cluttered. 

Is there a possibility to solve this, e.g. to have only one separator line? 
Or to remove the 1px distance between tool area separator line and the upper
view area border to make it less obvious?


STEPS TO REPRODUCE
1. Use default theme breeze light
2. Open Dolphin
3. -

OBSERVED RESULT
Upper / horizontal border of the view area is doubled up by the tool area
separator line (see attached screenshot). 

EXPECTED RESULT
There should be only one line, like in most Kirigami apps (see attached
screenshot).

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

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