Minor issues on opening files.

[iyatemu]

If a file uses more than one effect column, on saving and reopening, the expanded effect columns do not appear. They are present and function properly, but the user has to manually expand the effect columns again to see them.

A file with a custom refresh rate, for example, 64 Hz, will play at the proper speed when being worked on. After it's saved and reopened, the file will play back slowly, but the refresh rate will be saved. Changing and resetting the refresh rate will restore the file to its proper speed, but it will be slow again on the next load operation.

[rerrahkr]

Thanks for your reports.
I had forgotten changing the tick frequency when a module opened, so I fixed it in d31d7aa.
On the effect columns, since its status needs to be saved in the module file, I will revise the file spec and then fix it.

[rerrahkr]

I added effect display width settings to a module in ea4b627.