Source viewer improvements

[beastie1]

The source viewer is a great tool that I like a lot, especially the ability to edit and reload the modifications.

I'd like to share 2 improvement requests:

1. Integrate it as a tab
2. Change the "line selection" highlight color: there should be more contrast in the colors because the dark-blue background makes it very difficult to read the black text.

Thank you in advance and keep up the great work.

[pejakm]

1. is planned.

[ericjs]

I'd much prefer the ability to configure qupzilla to open source in another application. Like most developers I have a favorite text editor, I always have it open, and it is of course going to more handy for me than any built-in browser source viewer. (And most people using view source are developers.)

[nowrep]

Internal source viewer in tab is now used with QupZilla 2.