Update ListCategoryPostsWidget.php

Display the more link on the right side of the title bar based on user's setup.
Fix bug with thumbnail size on widget
Small fixes on catlink
Merge branch 'patch-3' of https://github.com/zxw0982000/List-Category-Posts into zxw0982000-patch-3
Adds feature to make widget title a link to the category.

Use 'catlink' as the value for the widget's title to make it a link to the category