* Move screen config files to new GUI lib
* Fixed bugs in config dialog related to service checkbox
* Test status tip
* Revert "Test status tip"
This reverts commit d11ad5bc22dab7edcf7ef0b3baada2fce240398a.
* Explain why service disabled
* Corrected client error message (written by non-native English writer) to make the message easier to understand for native English speakers
* Clearer logic
* Improve readability
* Coverage for 'add client' and client error messages
* Coverage for `Screen` class
* Clarify test names
* Use `const QString &` for backward compatibility
* Fixed lint warnings
* Prevent return paths after qFatal
* Use auto and abort to solve lint warnings
* Remove unused fake error
* Make operator hidden friend
* Remove redundant access specifier
* Convert int explicitly
* Swap && logic for linter
* Update ChangeLog
