This commit expands tabs to spaces (ts=4) in all the files under src/
and test/.
Until now we had two wildly different code styles with C using tabs and
new C++ using spaces. It is painful to maintain as none of the commonly
used tools support this kind of setup and in reality is needless, as we
can simply convert all the sources to spaces and have opened PRs do the
same, where needed.
Additionally, trailing whitespace has been removed.
PR #5138 had the unintended side-effect of drawing all disabled tabs, stemming from the assumption that !widget_is_disabled would be identical to widget_is_enabled.
I have reverted commit 4b91d92 to follow the original logic more closely, adding an exception for disabled tabs made explicitly visible through a sprite.
The tab PR has been much more involved than I'd originally anticipated. Hopefully, a new widget system will eventually make these things easier.
Both horizontal and vertical scrollbars had a malfunctioning widget: both the
right and bottom widgets weren't fired properly.
The bug was less noticeable for vertical scrollbars, as clicking the widget would
be treated as clicking empty space, which did not happen for the horizontal
scrollbar.
This patch fixes the underlying inconsistencies, making sure the widgets for
both types of scrollbars work -- when using either scrollbar, or when combined.
