typeahead-focus-first should select first if user has partially entered a value

[peder]

In the getMatchesAsync function, the activeIdx is set to 0 if focusFirst is true and always to -1 if false. I would argue that if user has already entered a partial value and then hits tab, the user would want that value to be selected. Instead, hitting tab without first hitting the down arrow results in no value being selected.

For instance, given a company field with values ['ABC Corp', 'XYZ Corp'] and typeahead-focus-first='false', if a user clicks into the field, both values appear but neither is selected. If the user types in ABC, I think ABC Corp should become the selected value. It seems like this would be more intuitive then forcing the user to hit the down arrow--they could just hit Tab after typing ABC.

Current: scope.activeIdx = focusFirst ? 0 : -1;

Proposed: scope.activeIdx = focusFirst ? 0 : inputValue && inputValue.length ? 0 : -1;

[icfantv]

@peder, in the future, please adhere to the issue template. It's there for a reason. I'm going to leave this open, however, as you've already submitted a PR. Please note that that PR needs work.

[peder]

I'll get this and the PR cleaned up.