Issue 76398

Steps to reproduce the issue:
In a new Writer document, edit the "Graphics" frame style in order to add space
below any inserted image.
Insert dummy text and in between it insert an image. When the image is inserted,
the spacing works as expected.
Now, right click over the image and select "caption". Enter any text and press
enter.
Expected behavior: the space set in the Graphics frame style keep a distance
between the image and the caption.
Result: the space below the image is transferred to the new external frame and
no space is left between the image and the caption. Below the external frame a
space NOT set by the user is inserted while the configured space below the image
is lost.
Notice: By re-applying the Graphics frame style to the image only, the space is
recuperated.
Everything behave as if direct formating were applied to both, Graphics and
"external" frame style reverting the spacing settings introduced by the user. In
fact, the frame where the image and the caption is inserted is a variation of he
"Frame" frame style, but with "direct formatting" applied on it: There is no way
to control the default properties of that frame.
Up to the moment, the only way to have a well defined "caption environment" is
to define it by hand, making the whole built-in captioning system useless.
Suggestion: when a caption is inserted, a new frame style must be created (maybe
based on the Graphics frame style, or maybe the same Graphics frame style) and
applied to the external frame without changing the properties of the original
frame. The change is not a great one and will give to the user more control over
the process.