confirmation toasts for successful item and value edits, comments added
converted everything in mainactivity into a fragment, created a fragmentpager for future use in a settings and a timer page, renamed the main layout to counterfragment, added a dummy fragment page layout

So far, everything is miraculously working somehow. Boy, converting into fragments is tough love. Learned a LOT.
added a simple line in mainActivity to set default fragment on creation.
switch statement in getItem inside pager uncommented to work properly