Using Edit Maps on maps with an adjusted grid loses the adjustment.

[Phergus]

Describe the bug
This will most often be seen when the map image is selected and "embedded" versus dropped on the Background layer. When embedded it is not unusual for a grid that is part of the image to be offset from the MapTool grid. Using Edit -> Adjust Grid allows you to get the grid size and offset correct. Having done so, if you then later use Map -> Edit Map to change one or more map properties, or change nothing at all but merely click on OK, the previously set grid offsets are lost causing a shift of any tokens that are set snap-to-grid.

To Reproduce
Steps to reproduce the behavior:

1. Load campaign file attached below.
2. Note Hero token at (4,6) in a tunnel intersection.
3. Use Ctrl-G to see that grid is aligned with map.
4. Use Ctrl-Shift-A to open Adjust Grid to see offsets of (-28,-26).
5. From Map menu select Edit Map. Click on OK.
6. Hero token shifts up and to the left. Observe Grid is no longer offset.
7. Use Ctrl-Shift-A to open Adjust Grid and note offsets are now 0.

Expected behavior
Expect offsets to be retained.

MapTool Info

• Version: 1.5.4+ but probably any version with Edit Map.
• Install: Any

Desktop (please complete the following information):

• OS: Windows
• Version: 10

Additional context
Remove .zip from filename.
BugEmbeddedMapShift.cmpgn.zip

[Phergus]

Closing.