[PATCH] user32/tests: Move test_mdi early in the test list.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=107224

Your paranoid android.


=== w864 (32 bit report) ===

user32:
win.c:2399: Test failed: style 0x200000: expected !100
win.c:2399: Test failed: style 0x300000: expected !100

=== w864 (64 bit report) ===

user32:
win.c:2399: Test failed: style 0x200000: expected !100
win.c:2399: Test failed: style 0x300000: expected !100

=== debian11 (32 bit Japanese:Japan report) ===

user32:
win.c:10702: Test failed: Expected foreground window 00020052, got 00F600C2
win.c:10704: Test failed: GetActiveWindow() = 00000000
win.c:10704: Test failed: GetFocus() = 00000000
win.c:10705: Test failed: Received WM_ACTIVATEAPP(1), did not expect it.