timeshift-gtk unnecessarily waits too much when creating or removing btrfs backup successfully

[AtFreezingPoint]

Describe the bug
timeshift-gtk unnecessarily waits too much when creating or removing btrfs backup successfully (even after the backup is done making or removing)

To Reproduce
Steps to reproduce the behavior:

1. Go to timeshift-gtk
2. Click on Create Backup
3. Backup creates but you wait something like 20 more seconds unnecessarily

Expected behavior
Wait time shouldn't be that long after successful creation or removal.

Screenshots

(15 or so seconds after successful creation)

(15 or so seconds after successful removal)

System:

• Linux Distribution Name and Version: [Ubuntu Plucky]
• Desktop [KDE]
• Application Version [24.06.6]