Issues with tooltip text position

[jwarby]

The plugin does not intelligently handle positioning of the tooltip text. There are two big issues around this:

• In some cases, content can extend off the edges of the screen, which sometimes results in the controls being off-screen, and thus unusable.
• In some cases, the tooltip content overlaps the close button in the top right corner. This can make the text difficult to read, and sometimes makes the controls hard to click (because the click will actually hit the close button instead of next/previous)