render the grid with lines

improve rendering of the grid

add missing files

Renamed modeleditcontext.cpp -> modeleditor.cpp

Major refactoring

Clean up Model

extract polygon cache out of Model

work on edit history

reworking

update

remove outdated comment

Use QSaveFile to save the file more safely

Fix handling of "BFC INVERTNEXT" with multiple inner whitespaces

Fix memory corruption involving document tools.

Update document tab label after saving

Saving works now

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mercurial