Implement Size-Responsive Track Properties Dialog.
Enable font selection entry "Dialog" for international language.
Correct default dialog font size to 10 pt.
Correct font selection logic for international font element duplicates.
Correct Route Properties dialog cancel/close behaviour (FS#1262)
Revert "Correct Route Properties dialog cancel/close behaviour (FS#1262)"

This reverts commit 7c6802c487de560f677b81265b1026743c97e3d1.

Reason:  To avoid merge problems with larger upstream commit.
Merge branch 'master' of github.com:OpenCPN/OpenCPN
Re-Correct Route Properties dialog cancel/close behaviour (FS#1262)