This is a work-in-progress to create a consistent API and finally
separate the whole Aseprite base/gfx/ui libs into a reusable C++ library.
Classes:
app::IFileItem, app::AppMenuItem, app::skin::SkinPart,
gfx::Rect, gfx::Border, she::FileDialog,
ui::IButtonIcon, ui::Graphics, ui::Overlay, ui::Widget,
ui::ScrollableViewDelegate, and UI events
This is to avoid leaving commands with old params (a problem with
keyboard shortcuts). To make sure, we've changed arguments from Params*
to Params&, so we always have params to load.
Also, in this change we introduce a new way to give parameters to executed
commands from menu items using AppMenuItem::setContextParams(). Before
showing a popup, we can call setContextParams() to give extra params to
the command (e.g. the specific FrameTag to remove or change properties).
In this way "contextparams" attribute for <item> in gui.xml is not
available anymore.
* Add LinkLabel::onClick()
* Use Widget instead of ListItem in ListBox API
* Add TextRule::padding() and use it to calculate the preferred size
for a skin::Style's rules
