Fixes #5026
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Since set_text can be called on a label, it seems to be an editable
label.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

This should help Doxygen parse VLC headers, and generally makes headers
easier to read. LibVLC already uses a similar approach.

In Lua files, embed an image file (PNG, ...) in a string.

Signed-off-by: Jean-Philippe André <jpeg@videolan.org>

This reverts commit 67875950.

Widgets can still be hidden though

This is "shortdesc" in the Lua descriptor

This patch defines a new type of interactions between the GUI and
so-called 'extensions'.
These extensions are dynamic plugins, that can be scripted, and they can
create GUI dialogs with widgets (like text fields, buttons, ...).