New browser engine reports based on new browser engine detection of DeviceDetector

*First step of removing old UserSettings stuff (refs #3962)*

- updates DeviceDetector to latest version (and adds missing browser/os icons)
- old BrowserType reports (UserSettings plugin) has been removed / replaced with new browser engine reports in DeviceDetection plugin
- those reports will be much more accurate as before the detection was only based on a browser name > browser engine mapping
- browser eninge is now stored in a new db field
- browser engine is also available for segmentation
would it be possible to make this UPDATE statement in one query only as otherwise it would take a loong time on big log tables to execute 5 UPDATE queries? 

eg you can use 
```
UPDATE %s SET
    config_browser_engine = 
    IF( config_browser_name IN( 'IE' ), 'Trident', 
         IF( config_browser_name IN( 'NS', 'PX', ... ), 'Gecko',
                IF (.........),
        ),
   )
```