Shift+Drag-selection creates new selection

[yuchi]

If I have already a selection and I start to shift + drag-selection (the dashed one) instead of adding the newly selected elements to the previous selection it just replaces the selection.

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Steps to reproduce

1. Create three text elements with a little bit of space around them
2. Select the first one
3. While pressing the shift key start a click-and-drag action and create a selection marker around the other two elements

Expected result

• All three text elements are selected

Actual result

• Only the elements included in the selection marker are selected, and not the first one

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I’d be very glad to help on this. The codebase is a little bit intimidating, so if you can give me some pointers it would be awesome.

[yuchi]

Also the issue is probably on mouse down since that clears the original selection immediately.

[yuchi]