show: swap usage along Memory usage bar

**Is your feature request related to a problem? Please describe.**
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
I would like definitely resit on NeoHtop if I would be able to see swap usage bar because it is my temp hurt due to 8GB of RAM only

**Describe the solution you'd like**
Additional bar of swap usage below main, current stats below