More intuitive and practical clear aliases

dotfiles/bash/global-before.bashrc

 export GLOBIGNORE=.:..
 
 # some more aliases
-alias cls='clear_to_bottom'
+alias cls='clear'
+alias clsz='clear_to_bottom'
 alias ll='ls -lh'
 alias lla='ls -lha'
 alias open='gnome-open'