Update strings_activity_settings.xml

Updated pref_defualt_xdotool_initial from a static assignment to a dynamic assignment using a double greped who command. This will ensure that DISPLAY will always be set to whichever display USER is currently using for X.
Update strings_activity_settings.xml

Replaced the two regular spaces between $USER and :[0-9]+ with two \s. For some reason two regular spaces in <string> turn into one space.
Merge pull request #3 from sharpTrick/better-initialization-command

Better initialization command