Tamago fails to automatically open new/file select dialog at start.

[cracyc]

This causes a crash if some menu options are selected, the new option opens the select dialog properly so the program is usable. This is caused by the use of animatepalette to animate the background. The program waits for the message queue to be empty to open the dialog but since animatepalette in 256 color mode (which is required for it to work) calls invalidaterect there's always a paint message. No easy way to fix this just like all the other animatepalette related problems. See also, https://github.com/otya128/winevdm/issues/1019