Fixed process start for application and webhelper

[wmbch]

The method Path.Combine() does not work (it has no string-based return of the combined value with AppData-path and the const string values for spotify.exe and spotifywebhelper.exe).

[JohnnyCrazy]

I just tested it and found out why it isn't working, the first slash in @"\spotify\spotify.exe" is the problem. Would you mind if we still go for the Path.Combine-Way and just replace it with @"spotify\spotify.exe"? Would love to merge it :)

[wmbch]

Allright! Reverted it to Path.Combine and fixed the backslash! :)

[JohnnyCrazy]

Nice, thanks :)