Replace webview object in "About" dialogue with text object and clickable text link

[robinpaulson]

Before fixing #202 we should perhaps first replace the "webview" object with a simple clickable text field. Webview isn't necessary for a few hyperlinks.

Textview looks like it will be suitable:
https://stackoverflow.com/questions/2734270/how-do-i-make-links-in-a-textview-clickable#2746708

[splitowo]

Hi there,
I have removed the WebView and put the text directly as a dialog message. The string is relocated to strings.xml.

splitowo@ea81b87

I couldn't reproduce #202, the links always opened in the browser for me, but if there is no longer WebView, this should be resolved, I suppose.

Below is the comparison after(London) and before(Melbourne) the change. The layout stays pretty much the same, the hyperlinks are clickable.

Let me know if that change is ok to pull

[robinpaulson]

Fixed with #320