Ok i just finished jailbreaking so i went into cydia. it asked me to install a essentials pack or something. i clicked ok. it has been installing and now it says at the top of the screen Running... then a whole heap of text at the bottom of the screen it says Installed cydia-sources and a full progress bar however there is still the loading symbol in the middle of the screen. and the last thing it was doing was "setting up cydia sources (0-7)... and its been stuck on that for the past 15 mins. what can i do?? it wont let me turn it off or anything!