This adds the support for 3D region data handling in History pane. Older history records that do not store 3D values are now treated as incomplete.

Main points

• Region of executed command is newly stored with 3D params
• Region values are now shown in two sections:
  2D parameters
  3D parameters

If a history entry has no stored 3D params (older JSON records), the 3D parameters section shows:
Unavailable for this history entry

Region comparison now has 3 explicit states:

• Region matches current region (check icon)
• Region does not match current region (cross icon + Update current region button)
• Region comparison with current region is incomplete (missing stored 3D parameters) - unknown icon and tooltip

Here is a single screenshot with all 3 cases side by side:

Here is the original state before this PR (only 2D params and 2 explicit states for comparison of history vs current region):