Fixes and updates

- StructViewer: added support for external access to button panel
- CreResource: Combined CRE conversion with Export button
- AreResource: Added integrity check to View Area function
- TisResource2/ViewerGraphics: minor changes to map viewer routine
Minor fix in Area Viewer
Added minimal support of FNT file type
Merge branch 'devel' of https://github.com/Argent77/NearInfinity into argent77-devel
Merge branch 'argent77-devel' into devel