ISSUE-594 fix panel actual_height with scale factor

[lagoshny]

Changed condition to define right actual panel height with scale factor to prevent the overlay panel to other window in full mode.

Fixes #594

[leolost2605]

The thing is this breaks when fractional scaling is enabled on wayland :\

For me the current version works on wayland both with

• fractional scaling
• 'normal' scaling i.e. 100 and 200 only i.e. physical layout

although it does require a wingpanel restart after scaling changed which definitely is something that can be optimized.

What combination would require this change? (X, wayland fractional or wayland not fractional)
Btw fractional is enabled when you add scale-monitor-framebuffers to the org.gnome.mutter.experimental-features dconf key

[lagoshny]

This is necessary for the X11 Display.
This behavior was the default until the wayland condition was added.

[leolost2605]

Ah ok then you should probably just remove the condition because it shouldn't be always true on wayland.

[leolost2605]

LGTM thank you!