I changed the key bind for "Add train stop" in the Control settings to "Shift + Right-click".
control settings - Add train stop.png
I then opened the map while driving a train.
I looked at the top right of the remote view and saw that the key bind was still displayed as "Shift + Left-click ...

0.002 2019-05-11 17:13:38; Factorio 0.17.38 (build 44914, win64, steam)
0.002 Operating system: Windows 10 (version 1803)
0.003 Program arguments: "D:\SteamLibrary\steamapps\common\Factorio\bin\x64\Factorio.exe"
0.003 Read data path: D:/SteamLibrary/steamapps/common/Factorio/data
0.003 Write ...