RTL support for wordpress admin dashboard and plugins

Hello, This is my first post in here, I am a new subscriber,
after I installed the dashboard and other plugins, I notice that when I am using a rtl dashboard the styling is all messed-up, has no support or special css file for rtl, how do we add our styling css file to overwrite the default styling , without losing it when update occurs, I am using genesis frame work child theme.
thanks

note : i have chosen WPMU DEV dashboard plugin for the support , but all the plugins has problem with css without exception.