Fix table direction to Left-to-right

Submitted by Khazar

Assigned to Mike Massonnet

Link to original bug (#11393)

Description

Since paths and processes names are always written in English, I think that the table widget direction should be LTR GTK_TEXT_DIR_LTR (see gtk_widget_set_direction) even in RTL locale.

P.S. table direction of Microsoft Windows Task Manager is in RTL.