[KBSWITCH][CPL:INPUT][NTUSER][EXPLORER] Fix keyboard layout icon (#4815)

Fix keyboard layout icon in taskbar notification area. JIRA issue: CORE-11700, CORE-2699, CORE-18546
- Call ActivateKeyboardLayout to select the keyboard layout correctly.
- Modify WM_INPUTLANGCHANGEREQUEST parameter.
- Modify BroadcastSystemMessageW parameter.
- Revert Taskbar Notification Area MA_NOACTIVATE HACK 8344291 . This fixes Context Menu display.
- Load the "IME File" value and set the IME icon if necessary.
- Correctly implement global hooks.

win32ss/user/ntuser/defwnd.c

@@ -960,7 +960,7 @@ IntDefWindowProc(
                     if (hwndSwitch)
                     {
 #define ID_NEXTLAYOUT 10003
-                        UserPostMessage(hwndSwitch, WM_COMMAND, ID_NEXTLAYOUT, 0);
+                        UserPostMessage(hwndSwitch, WM_COMMAND, ID_NEXTLAYOUT, (LPARAM)UserHMGetHandle(Wnd));
                     }
                 }
             }

win32ss/user/winsrv/consrv/frontends/gui/conwnd.c

@@ -2356,6 +2356,11 @@ ConWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
             {
                 return DefWindowProcW(hWnd, msg, wParam, lParam);
             }
+            /* Detect Alt+Shift */
+            if (wParam == VK_SHIFT && (msg == WM_SYSKEYDOWN || msg == WM_SYSKEYUP))
+            {
+                return DefWindowProcW(hWnd, msg, wParam, lParam);
+            }
 
             OnKey(GuiData, msg, wParam, lParam);
             break;