Added "tasker" alias to ".bashrc".
Fixed "history" for "impersonate mode" in ".bashrc".
Added "shell-root" exemption to "shell" in ".bashrc".
Revert "Added "shell-root" exemption to "shell" in ".bashrc"."

This reverts commit 745e9a7b712e0b0a4d0cb16a2c8359f64d2ef99d.
Fixed "history" for "impersonate mode" in ".bashrc".