Machine translation & Qterm improvements

Machine translation improvements 

• Added document, project, and segment-related metadata to MT SDK 

Qterm user experience improvements 

• Accept required text meta field without default value 
• Show active Qterm filter in the project/language view 

Other features and enhancements

• Some of the desktop client’s “Automatic lookup and insertion” options are now available in WebTrans
• PPTX filter: special spacing/kerning can optionally be ignored
• Edit Distance report can be created through WS-API
• Track changes: accept and reject all changes (only on the desktop client app for now)