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 doc::ExportData with information about the last export operation.
- Add RepeatLastExport command.
- Add SaveFileBaseCommand as base Command class, to accept "filename"
param.
- Add parameters to ExportSpriteSheet so we can call it without UI
from "repeat last export".
