1.5.5 - viewer - fullscreen - incorrect panes behaviour

[user0]

XnViewMP 1.5.5 64bit
Windows11 (22H2), display resolution 3840x2160, win scaling 150%

Viewer - fullscreen
few issues with panes when switching normal/fullscreen modes

To reproduce:
1. run clean portable XnViewMP
2. open any image in viewer
3. press F11 to switch to fullscreen mode


Issue A
4. move cursor to the right to show Properties pane
(issue reproduces if Properties pane appears in fullscreen with some gap on top, ref issue B pic)
- pin Properties pane
5. press F11
Viewer will have pinned Properties pane

a.png

Issue B
4. move cursor to the right, above Properties pane
- move cursor up and down over the edge (blue line)
Properties pane will shrink to the right

b.png

Issue C
4. move cursor to the right to show Properties pane
- pin it
5. move cursor to the top to show Navigation pane
- pin it
5. press F11 to exit fullscreen
6. press F11 again
7. move cursor to the top to show Navigation pane
Navigation pane will be short in size

c.png

Issue D
4. enable Show toolbar in Settings
5. try to invoke Navigation pane
Navigation pane appears when you hover over thin red line if Toolbar is enabled, which is inconvinient
its better to use screen edge (blue line)

d.png

[xnview]

Thanks to your detailed description I can reproduce the problem.