Removed embedded keyboard support
Made font patch transparent
Implemented Issue #10
Fixed possible exception when device is very slow
Fixed google play bug 8
Reduced number of cases where the keyboard appears when it should not
Disabled back when doing lessons or reviewing lessons
Integrated WK Review order 0.31
Release 1.8.3pre0
Made keyboard reset earlier
Disabled back button in review summary page as well
Made ignore button more ignore button-like