#643 TTipDialog does not load the last tip from the file

[Ognyan Chernokozhev]

OWLExt TTipDialog loads tips from a file named tipfile.tip that should reside with the application executable.
The file should contain tips - one per line - and lines starting with semicolon will be skipped.

The last line in the file will not be loaded, instead the logic will roll over back to the first line.

As a workaround, an empty last line can be added.

[Ognyan Chernokozhev]

Fix implemented in trunk ([r8787]), 7.0 ([r8788]), 6.44 ([8789]) and 6.36 ([8790]).