makefile.am: split long lines into one file per line

This makes it easier to read diffs.
Cosmetic change to build system only.
GUI: Fix design in overview page
small headers ordering cleanup

- keep headers in alphabetical order
- fix Makefile.am (2 files in 1 line - leftover)
- remove some spaces etc.
Merge pull request #3510

c037531 small headers ordering cleanup (Philip Kaufmann)
[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)
Tweak linearize.py to give more flexibility

Add the ability to start at a non-zero height, and allow for appending to
an existing file.
Merge pull request #3518 from Michagogo/linearize-start-value

Tweak linearize.py to give more flexibility