All versions of OpenVPN Connect

Changes from 1.1.24 to 1.1.25: * added knob to reject connection using certificates signed with MD5 (default on) * added knob to switch to Dark theme * fixed crash when pushing the 'back' button in file dialog Changes from 1.1.23 to 1.1.24: * relax the certificate validation in mbedTLS to allow certificates with broken date format to connect * re-enabled deprecated and insecure md5 signature algorithm. Support for md5 will be officially DROPPED on Apr 31st 2018