Allow changing the current directory for tabs only.
It doesn't make much sense for users to use both:
let g:rooter_use_tcd = 1 and let g:rooter_use_lcd = 1
but regardless, I made g:rooter_use_tcd have higher priority over g:rooter_use_lcd since the tab's current dir is more general and a window will override that with its own local current dir.
Allow changing the current directory for tabs only.
It doesn't make much sense for users to use both:
let g:rooter_use_tcd = 1andlet g:rooter_use_lcd = 1but regardless, I madeg:rooter_use_tcdhave higher priority overg:rooter_use_lcdsince the tab's current dir is more general and a window will override that with its own local current dir.