Allow selecting lines by clicking and/or draging line numbers
In Meld there is only a few pixel wide space between the light grey background and the horizontal center of the first (in programming usually invisible character). If I drag further to the left, nothing gets selected. If I drag further to the right, I miss the first character of the first line.
In other editors like Android Studio, to select line 100 to 120, I can click and drag down on the line numbers or the background around the line number outside the text field to select full lines. Please adopt this UX.