2) When an error occurs from the backend, the configure window opens and if the user has changed the setting
of the port, it won't take any effect as we have retrieved the value of the port at the start of the runtime.
3) Added logic to identify the specified fixed port is already in use. Throw the error before starting the pgAdmin server.
Fixes#5751
Major refactoring of the runtime code, Specifically:
- Move the bulk of the core code from main() into a new Runtime class.
- Break up the mass of code that was main() into a number of relatively simple functions.
- Make the Configuration dialog synchronous so the Log dialog can be properly viewed.
- Enable/disable menu options at the right time.
- Remove support for Qt < 5.0.
- Remove the application name constant and hardcode the name to simplify the code.
- Improve log messages.
- Replace the sdbm hashing with Qt's MD5 hashing.
1) Shutdown the python server properly.
2) Disabled "Shutdown server" menu till server is not successfully started.
Initial patch sent by Maxim, modified by Akshay Joshi.
