The Edit Token Dialog doesn't resize Properties grid properly.

[Tdue21]

Describe the bug
When resizing the Edit Token Dialog, the property grid doesn't follow all the way. At some point the grid stops resizing vertically.

To Reproduce
Steps to reproduce the behavior:

1. Select a Token
2. Right-click and Select Edit
3. Go to Properties tab
4. Resize Dialog until it is very large.
5. Observer PropertyGrid not resizing completely.

Expected behavior
I expect the property grid to fill the tab at all sizes.

Screenshots

MapTool Info

• Version: 1.5.12
• Install: Upgrade [1.5.xx]

Desktop (please complete the following information):

• OS: Windows
• Version 10

Additional context
==== MapTool Information ====
MapTool Version: 1.5.12
MapTool Home...: C:\Users\Thomas.maptool-rptools
Max mem avail..: 3 GB
Max mem used...: 444 MB
Custom Property: -DMAPTOOL_DATADIR=.maptool-rptools

==== Java Information ====
Java Vendor.: Oracle Corporation
Java Home...: C:\Users\Thomas\AppData\Local\MapTool\runtime
Java Version: 10.0.1

==== OS Information ====
OS Name........: Windows 10
OS Version.....: 10.0
OS Architecture: amd64
PATH...........: C:\Users\Thomas\AppData\Local\MapTool\app;C:\Users\Thomas\AppData\Local\MapTool
Number of Procs: 4

[emmebi]

Assign it to me, will work on this during the week.

[Phergus]

Tested. Properties grid now fills the available area.