User manual spelling fixes

Signed-off-by: Sergey Starosek <sergey.starosek@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Open external links in default browser

Signed-off-by: Sergey Starosek <sergey.starosek@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Print: fix truncated table in "Table print" mode

The whole procedure here is quite confusing.
Once we have our model populated, we need to estimate where
to put page headers (each page has one) and to do that we
store a list of indexes, where a page would begin (pageIndexes).

But since a row can end up being chopped at the end of a page
we move it to a new page and this particular part was lacking
compensation for the moved row's height, when storing the *last*
pageIndex.

For N number of pages we are losing N - 1 dives, or such that
were previously transferred on a new page.

See #326

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
MainWindow: fix setTitle() calls

setTitle() works with an enum that can be fed different values,
and other we may have eventually. For example not only "app title",
or "app title: filename", but others, like dates, certain app status
and so on.

Patch fixes an issue where deleting a single dive in the divelist
resets the title to "Subsurface" only. clearUpEmpty() should only
call setTitle(MWTF_DEFAULT) if no file is currently open.

It also adds a safe-guard to revert back to MWTF_DEFAULT if
no file is open but setTitle is called with MWTF_FILENAME.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>