Flags appended incorrectly to command

[njdom24]

Describe the bug
Using bisync and the flag --resync, the command to be executed becomes rclone --resync bisync ..., which errors out.

To Reproduce
Steps to reproduce the behavior:

1. Enable bisync in settings
2. Add --resync to flags
3. Attempt sync (with dry-run)
4. See error

Expected behavior
Should run rclone bisync ... --resync to execute properly

Desktop

• OS: [SteamOS 3.4, Arch Linux]
• Version 0.18.1