Remove repeating items from history menus

dotfiles/i3/config

 bindsym $mod+b              exec "saturnin www -1 | head -1 | uba -r"
 bindsym $mod+Shift+b        exec "saturnin www -1 | uba"
 bindsym $mod+i              exec "saturnin conf -j -S www.ini | saturnin dmenu -l 20 --split = | uba"
-bindsym $mod+Shift+i        exec "tac .local/share/uzbl/history | saturnin dmenu -l 20 --split-field 3 | uba"
+bindsym $mod+Shift+i        exec "tac .local/share/uzbl/history | uniq | saturnin dmenu -l 20 --split-field 3 | uba"
 bindsym $mod+c              exec "saturnin clip save"
 bindsym $mod+Shift+c        exec "saturnin clip load"
 bindsym $mod+Shift+f        exec thunar
 bindsym $mod+m              exec "saturnin conf -j -S -s dmenu.item | saturnin dmenu --split = | bash -"
 bindsym $mod+Shift+m        exec "i3-dmenu-desktop --dmenu='saturnin dmenu'"
 bindsym $mod+p              exec "dmenu_path | saturnin dmenu | bash -"
-bindsym $mod+Shift+p        exec "tac .dmenu_history | saturnin dmenu | tee -a .dmenu_history | bash -"
+bindsym $mod+Shift+p        exec "tac .dmenu_history | uniq | saturnin dmenu | tee -a .dmenu_history | bash -"
 
 bindsym $mod+n              exec "saturnin iam bbl"
 bindsym $mod+Shift+n        exec "saturnin iam bbldone"