Add few convenience bmo-be spots

dotfiles/config/bmo/be.ini

     enter = fi; true
     spike = bmo kb home && slock
 
+[be.def.spot.role:working]
+    enter = :
+
 [be.def.spot.role:gone]
     shape = bounce
     enter = ssh-add -D 2>&1 && notify-send "all identities removed"
     spike = bmo kb home && slock systemctl suspend -i
     leave = weechat-fifo -s \*/connect -all
 
+[be.def.spot.role:presenting]
+    important = true
+    enter = :
+
 [be.def.spot.feel:night]
     enter = light -S 8;   redshift -O 1000