Add auto-detection for links

[dlemmermann]

Add as an optional feature the ability to auto-detect urls in regular text.

[sghpjuikit]

I'm thinking of trying this (no promise)

I wonder if this is not relatively easy to do by tracking mouse drag events, looking up exact Text node hovered, down to exact letter (this might be the hard part) and applying text background on all in between Text nodes. Simple mechanism would select by Text nodes, then exact characters. The latter would be doable using simulated interpolation using JavaFX computeTextWidth(text, font) util method. The background would have to be interpolated as well - which may be tricky.