[AlwaysOnTop] Proof of concept (#14360)

Co-authored-by: Niels Laute <niels.laute@live.nl>

.github/actions/spell-check/expect.txt

@@ -39,6 +39,7 @@ ALLOWUNDO
 ALPHATYPE
 Altdown
 altform
+alwaysontop
 amd
 Amicrosoft
 AModifier
@@ -1169,6 +1170,7 @@ mlcfg
 mmdeviceapi
 mmi
 mmsys
+mmsystem
 mockapi
 MODECHANGE
 moderncop
@@ -1325,6 +1327,7 @@ NOTIFYICONDATAW
 NOTIMPL
 notmatch
 Noto
+NOTOPMOST
 NOTRACK
 NOUPDATE
 NOZORDER
@@ -1889,6 +1892,8 @@ SVGIO
 svgpreviewhandler
 SWC
 SWFO
+Switchbetweenvirtualdesktops
+SWITCHEND
 SWP
 swprintf
 SWRESTORE
@@ -1909,6 +1914,7 @@ SYSKEYUP
 syslog
 SYSMENU
 systemd
+SYSTEMASTERISK
 SYSTEMTIME
 Tadele
 tadele
@@ -2188,6 +2194,7 @@ Winhook
 winkey
 WINL
 winmd
+winmm
 WINMSAPP
 winnt
 winres
@@ -2219,7 +2226,7 @@ WNDPROC
 wofstream
 wordpad
 workaround
-Workflow
+workflow
 workspaces
 wostream
 wostringstream