Signed-off-by: Christoph Lohmann <20h@r-36.net>

Thanks Airwave!

Thanks p37sitdu@lavabit.com!

Thanks p37sitdu@lavabit.com!

Thanks Johannes Hofmann <Johannes.Hofmann@gmx.de>!

Thanks Alexander Rezinsky <alexrez@gmail.com>!

Thanks Alexander Rezinsky <alexrez@gmail.com>!

Thanks Alexander Rezinsky <alexrez@gmail.com>!

Thanks Alexander Rezinsky <alexrez@gmail.com> for mentioning this!

Thanks Alexander Rezinsky <alexrez@gmail.com> for the suggestion!

Thanks Alexander Sedov <alex0player@gmail.com> for suggesting the fix!

We're now clearing empty areas with spaces, so there is no point to check
if character contains non-empty string.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

The commit b78c5085f7 changed the st behaviour enabling BCE capability,
that means erase regions using background color. Problem comes when you
clear a region with a selection, because in this case the real mode of the
Glyph is not the value of term.line[y][x], due in drawregion we had enabled
the ATTR_REVERSE bit.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Now double-click+dragging automatically snaps both ends to word boundaries
(unless on series of spaces), and triple-click selects whole lines.
As a side effect, snapping now occurs on button press, not button release
like it previously was, but I hope that won't be inconvenient for anyone.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Now, when you are selecting a region, you will get all empty lines that happen
to be in it, including trailing ones. Last line terminator is omitted as it previously
was, though.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Now, newly allocated Glyphs are set to spaces and current cursor colors
with tclearregion() routine.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Never apply patches of Apple users without shouting at them. The basic rule of
nature is that when you apply Appl users patches without shouting at them that
something will go horribly wrong.

To have a more visible cursor on unfocused windows this patch makes st draw a
rectangle around the terminal cell.

Thanks Mark Hills <mark@xwax.org> for the suggestion!