Set external properties doesn't work correctly

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.5, 3.6.2
• Fix Version/s: 3.7 GA1
• Component/s: Servers
• Labels: None

1.  the external file gets completely overridden and lose your custom settings 
   1. https://liferay.dev/forums/-/message_boards/view_message/11455938
2. should not prompt Invalid external properties file when browse an existing properties file
   1. double click on server
   2. enter/browse an existing properties file in Liferay Launch part
   3. save