Filter logs based on _filterValue

@function
@private
function() {
    var collection = _logContainer.childNodes;
    var i = collection.length;

    if (i === 0) {
      return;
    }

    while (i) {
      _filterElement(collection[i - 1]);
      i -= 1;
    }
    window.scrollTo(0, document.body.scrollHeight);
  }