Multiple line graph views

[gfgit]

Is your feature request related to a problem? Please describe.
Currently you can view a single line graph view at a time. Viewing multiple Lines can be useful in some situations

Describe the solution you'd like
Take inspiration from Qt Creator layout in which you can split the Window both vertically or horizontally multiple Times and in each section you can view a line independently from others.
Plus each section can be moved to a separate Window which can again get splitted for the benefit of multiple screen setups

Describe alternatives you've considered
Keep things unchanged if too difficult to implement