Updated UI to current conventions.
Refactoring.
Enabled dialog navigation for BPM scan result and tap dialog.
Cosmetic changes.
Removed obsolete dialog.h.
Merge branch 'feature-preferences-update'
Introduced wrapper class for FFTW so it can be easily replaced by another FFT library.
Merge branch 'feature-fft-wrapper'
Bumped version number to 0.2.4.3.