[EXPLORER.EXE] has issues with hiding taskbar in fullscreen (where explorer_old and 2k3sp2 explorer behave fine) Diablo II

reactOS 0.4.8-RC-25-g11bf8fa
on VBox 4.3.40 without additions VBEMP was in use.

Our explorer_new has issues for many programs still hiding its taskbar when in fullscreen.

This is almost for sure an issue compiled into the explorer_new binary, as both: explorer_old and explorer from 2k3sp2 behave fine in these scenarios

For testing I use:

• Diablo II shareware main menu (from rapps)
• DosBox 0.74 (from rapps)

In both apps the taskbar stays visible with explorer_new, but explorer_old and 2k3sp2-explorer behave fine.

0.4.8RC25_explorerNew_vs_ExplorerOld.webm (bad vs good)
Explorer_new_Only.log covers the first problematic part of the video (bad)
Explorer_new_and_Explorer_Old.log covers the full video (bad vs good)
2k3explorer.log behaves like the second part of the video (good)