Dashboard graph suggestion

[ta-vroom]

Mounting a folder with rclone is resulting in some unexpected behavior in the graph.

Steps to reproduce:

1. Mount folder
2. touch file
3. look at graph's speed

Expected behavior:

Speed would decrease to 0 after transfer completes

Actual behavior:

Speed stays a constant value

Now, according to my research on the subject, this is expected behavior according to the creator's definition of speed in the program. As a user, it gave me a false sense that some background behavior transfer was happening on said mount.

Suggested remedy:

Add a dashboard options menu and allow for disabling the speed line altogether (this can currently be done via left clicking the legend for speed, but this action is not permanent).