v0.9.4

• Correct handling of argument definitions wich contains a default value with existing variable with same name
• Implement "Uncaughted Failed Keywords" exception breakpoint
  • from now this is the default breakpoint, means debugger stops only if a keyword failed and it is not called from:
    • BuiltIn.Run Keyword And Expect Error
    • BuiltIn.Run Keyword And Ignore Error
    • BuiltIn.Run Keyword And Warn On Failure
    • BuiltIn.Wait Until Keyword Succeeds
    • BuiltIn.Run Keyword And Continue On Failure
  • partially fixes #44
  • speedup updating test exploers view