[Ltx-Model] Fixed minor issue in source analyzer

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[*] Adapted to changes in LTK (assist)

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[*] Refactored
  - Adapted TexImages to uiresources instance pattern
  - Moved more text classes to core

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[Tex-Project] Fixed report of progress

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[Tex-Project] Fixed NPE if participant is disabled

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[Build] Added generation of source references

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[Ltx-Editor] Adapted to changes in LTK (code folding)

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[Ltx-Model] Registered contentType for ltx model

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[*] Cleaned up

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>