Many error messages were translated when using `BKE_report()` or
`BKE_reportf()`, directly, but others were missing because they used
`WM_report()` or `WM_reportf()`.
This commit adds these two functions to the list of functions used in
the message extraction regex.
In addition, `WM_reportf()` is modified so that the format string is
translated before formatting actually occurs.
006bc603f8