Save x by y date isn't calculating required contributuion.

[iffy]

Version: 0.55.3 (node: v10.2.0)
OS: win32 10.0.18362 x64

[iffy]

Steps to duplicate:

1. Create a bucket
2. Click the gear
3. Change Bucket type to "Save X by Y date"
4. Enter a number in "Goal:"
5. See that the required deposit doesn't change.

If you change the date, though, it will start computing the required deposit.

[iffy]

Included in v0.57.5 release (AUTOMATED COMMENT)