Add more default style folders.
Additionally checks if current file is in a /style/ or /styles/ directory for more robust default color importing support.
Restricts imports to match the file suffix. (only imports .scss files if you open a .scss file)
Resolves bug when import file matches other file name with wrong suffix
Fix interaction of plugin with other plugins using matchadd()
Fix typo to enhance performance when parsing color literals that are not assigned to a variable.