* TechDraw: Replace annotation edit dialog with QPlainTextEdit
* Remove useless include introduced in previous commit
* Remove trailing _ for members to conform with rest of the codebase
* Add const & to string vectors that don't need copying
* Fix IWYU linter warnings
* Forward all annotation double clicks to the StringList property editor
* Remove unused dialog
* Fix Qt 5 build error
* Fix missing exports with MSVC
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