data/UserManager.java: hide unneeded stack trace

  * hide unneeded stacktrace from old logindata parser
ADDED: Java version detection for OSX
Merge pull request #700 from Viper-7/master

ADDED: Java version detection for OSX
FIXED: Permission error from OSX Java version detection
Merge pull request #701 from jikuja/fix_numberformatexception

data/UserManager.java: hide unneeded stack trace
Merge pull request #702 from Viper-7/master

FIXED: Permission error from OSX Java version detection
FIXED: Java binary permissions issue on OSX
FIXED: Unsupported version message
Merge pull request #703 from Viper-7/master

FIXED: Java binary permissions issue on OSX
Fixed new java path code

 * When opening advanced option, show error screen only once
 * Empty path is not error. Launcher will use default JVM
 * Set initial color to red if file not found