GUI: Fix design in overview page
[Qt] guard bitcoin-config.h and remove dublicated help message code
[Qt] fix alphabetical ordering in Makefile.am

- also change to 1 file per line for more stuff in Makefile.am
Merge pull request #3507

9b146cd GUI: Fix design in overview page (Cozz Lovan)
Merge pull request #3511

245a6ab [Qt] guard bitcoin-config.h and remove dublicated help message code (Philip Kaufmann)
Merge pull request #3513

d464edf [Qt] fix alphabetical ordering in Makefile.am (Philip Kaufmann)