Various stability and performance fixes
Fixed an issue where some URL parameters were duplicated in Collection Runner ...
Fixed an issue that caused example response language to reset on save ...
Fixed an issue where deleting a single character from a variable removed the full variable.
Fixed an issue which caused HTML elements in response to not be copied correctly
Fixed a bug where Save dialog was not shown while closing multiple tabs via context menu
Fixed an issue where variables were not resolved while manually authorizing request.