Update to v1.2

Add Enable/Disable Notification Center function
Add Enable/Disable desktop notifications function
Change tasklist filtering to hopefully work with different system languages
Change some functions that ask to restart to instead ask to sign out
Change wording from "needed" to "required" on some text
Improve WSH function
Add slight delay to image selection for lockscreen and profile image functions for a slightly improved user experience
Revamp back-end menu system
Various minor code improvements