Fix #1949 "fr:xforms-inspector causes PDF template error"

- also indent for clarity
PDF template: don't duplicate code
IntelliJ project files: disable OSGi detection
IntelliJ project files
Fix #1987 "PDF template: non-boolean checkboxes don't work"

- this has probably been broken for a long time
- selection controls produce `export-value` mappings
- PDFTemplateProcessor consumes `export-value` mappings
- also prevent mapping of acrobat field names with `$null`
Fix #1955 "PDF template: fr:number is always blank"

- also fix fr:currency
Fix annotate property defaults
Minor: inline property
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