wmstartup: Add more services, move service logic out of common.bash

.config/dtfscripts/services/conky.dtf

@@ -11,10 +11,6 @@ service_name="Conky"
 service_process="conky"
 
 function start() {
-	if ! prestart; then
-		svc_log "Failed pre-start checks"
-		return 1
-	fi
 	for file in $XDG_CONFIG_HOME/conky/*.conf; do
 		svc_log "Starting with config $file"
 		conky -c $file > /dev/null 2>&1 &