[BUG] Paused tasks working

### Configuration
- Keka version: [e.g. 1.1.24 (3421)] Version 1.2.55 (5009)
- macOS version: [e.g. 10.14.6 (18G2022)] 10.15.7

### Describe the bug
A clear and concise description of what the bug is.
Attach a log file reproducing the issue: https://github.com/aonez/Keka/wiki/Report-an-issue

Whenever I start one compression job, pause it, then go to the next one in the list, then pause that one, and either do nothing, or go back to a previous compression job in the list, the paused items in the list then show an amount of time remaining (while the status bar is grey). This will cause any compression job that finishes while paused to show up in the finder as partially completed.

### To Reproduce
Steps to reproduce the behavior are explained above.

### Expected behavior
A clear and concise description of what you expected to happen. When I pause a compression job in the list, it should stay paused until I resume it.

This happens when I have Keka set to only do one compression job at a time.