Bugs & pulls

Fixes a bug and merges more contributions.

• FIX Rowspan in a column loses widgets in later columns
• Merged pull request for README clean-ups (@theverything add-missing-option-to-readme)
• Merge Nord color scheme (@jrswab nordColorScheme)
• Merge support for multiple (and filtering) network interfaces (@mattLLVW feature/network_interface_list)
• Merge filtering subprocesses by substring (@rephorm filter)