Remove `xx%` by default.

[zanminkian]

Hi! Thanks for providing such a good extension! But there is still a tiny enhancement to improve this extension in my humble opinion. Is it possible that remove the xx% at the end by default to make the status bar more clean? It's redundant because we only focus on the usage and total amount of the memory. Moreover we can easily compute the percent.

Vscode provide a guide of status bar. I think it's reasonable to keep the status bar in short.

Thanks for considering.