add button "select all (segments)" in Editor to upper left corner of segments view

Hi,

could you please add a "Select all (segments)" button to the upper right corner of the segment view (like the corner in Excel between Column and row), so that we could select all segments just with one click.

This would be especially helpfull if a client once again prepopulated all target segments with source string so that we can remove that garbage from target, or after filtering for strings so that you can lock them faster.