Make find-and-replace matches start at the position of the caret before Ctrl+F was pressed #156

Currently, if no find-and-replace query has been executed before, the first match found will be the first in all the code. The expected result mirrored in IDEs is starting at the first match after the position of the caret, which is so expected that I would classify the current behaviour as a bug.

As the FindAndReplace plugin is user-facing UI, not an API, changing this is not a breaking change. For cautiousness' sake, this probably is a breaking change.