Allow falling back to the alternate variable definitions if the built-in
text block variables are not set.
Also push the project into variable resolution when plotting
Fixes https://gitlab.com/kicad/code/kicad/issues/11168
ADDED CURRENT_DATE titleblock token (to go with existing ISSUE_DATE)
ADDED PROJECTNAME schematic token (to go with FILENAME and SHEETNAME)
Converts other parameters to project text variables.
- remove ${COMMENT0}, that was broken (returned the same as ${COMPANY}.
- So ${COMMENT1} to ${COMMENT9} are only recognized for Comment1 to Comment9
in page settings dlg, and are equivalent to our old %C0 to %C8 format string
- fix a minor coding style issue.
Fixes#7642https://gitlab.com/kicad/code/kicad/issues/7642
This moves the program-specific code (e.g. BIU files) into
the program tests.
Also, create title_block.cpp to break a dependency that pulled
in eda_text.cpp when using the TITLE_BLOCK object.