notepad: Detect if saving will lose information.

[Alexander Scott-Johns]

---
 programs/notepad/En.rc         |    7 +++
 programs/notepad/dialog.c      |   95 +++++++++++++++++++++++++++++++++------
 programs/notepad/notepad_res.h |    2 +
 3 files changed, 89 insertions(+), 15 deletions(-)

--001636c923d7f9475a046d34e711
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