Since `parse.gperf` was added long ago, the ability to run Tux Paint
with "--fullscreen" command-line, or simply "fullscreen" in the
config. file, no longer exists.
It must be `--fullscreen=yes` (or `--fullscreen=native` as an
alternative to `--fullscreen=yes --native`). It can also accept
`--fullscreen=no` as an alternative to `--windowed`.
Updating the following places
* BASH tab completion
* `tuxpaint --help` output
* FAQ
h/t Karl for reporting
Closes https://sourceforge.net/p/tuxpaint/bugs/289/
...mostly in terms of modularizing how various file
and directory (folder) paths are shown (for consistency in
both name and styling); add some missing paths (e.g., where
does Tux Paint save drawings on Haiku?)
When selecting a label that has a color not found in the built-ins,
we change to the color picker; however, when rendering its button,
it looked wrong and would not fit to the right size (had 48x48
hard-coder in there, still!) Instead, using `render_color_button()`
to just re-render it.
Also, dropping LOW_QUALITY_COLOR_SELECTOR which had been used by
some embedded platforms we don't seem to support any more (Nokia Maemo
and OLPC XO-1).
Some already-translated (but very out-of-date) content
has been replaced with not-yet-translated (i.e., English) content.
Translators may want to look at the previous revisions of these
files when translating the new 'tuxpaint-docs' gettext catalog.
Sorry to cause extra work here, if I've done so.
