System Information
Operating system: Windows 10
Graphics card: GTX 750Ti

Blender Version
Broken: (2.80 13 Mar 2019 Build:-bf9904ec8018-)
Worked: (2.79b)

In edit mode, cannot select vert, edges or faces "through" transform widget

Exact steps for others to reproduce the error
--Note: steps for verts, edges and faces are affected the same way)--

Open Blender - Delete default cube
Create UV sphere
Open "Modelling" workspace (or [Tab] to edit mode)
Press [Alt]-A to deselect all verts.
Activate transform Widget (All transforms) [Shift]+[Space], T

Click to Select a vert - Transform widget appears
Hold [shift] and attempt to click to select another vert behind the widget

• Widget responds to click instead of mesh behind it.
• Cannot select additional verts.

Note: This behaviour does not occur in 2.79b Verts can easily be selected through widget.

Expectation
As a single click does not provide any function to the Transform widget, the click event should be passed to the object behind it to respond (in this case, by selecting a vert)