Fixes and improvments for config dialog

[rdoeffinger]

• Fix endless append of / at end of password store path on Windows
• When the user is told to fix the binaries configuration, send the straight to the proper tab to fix it
• Add an autodetect button for the programs, so that if the user forgot to install dependencies onfirst start they don't have to fill everything in manually once they did.

[codecov[bot]]

Codecov Report

Merging #432 into master will decrease coverage by 0.04%. The diff coverage is 0%.

@@           Coverage Diff            @@
##           master   #432      +/-   ##
========================================
- Coverage    7.25%   7.2%   -0.05%     
========================================
  Files          41     41              
  Lines        2662   2678      +16     
========================================
  Hits          193    193              
- Misses       2469   2485      +16

Impacted Files	Coverage Δ
src/configdialog.h	0% <ø> (ø)	:arrow_up:
src/mainwindow.cpp	0% <0%> (ø)	:arrow_up:
src/configdialog.cpp	0% <0%> (ø)	:arrow_up:
src/qtpasssettings.cpp	7.57% <0%> (ø)	:arrow_up:
src/util.cpp	8.62% <0%> (-0.16%)	:arrow_down:

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[coveralls]

Coverage decreased (-0.04%) to 7.216% when pulling 7f8136e4f08baea281cef62393ff75616ce09c74 on rdoeffinger:configfixes into 32ea1ad39a51b0d1b7e7b24351ae1139c3f5dbec on IJHack:master.