win: fix borderless_set behavior

win: fix borderless_set behavior

Summary:
According to the current elm_win code, client side border should be removed
when window is fullscreen mode. And border couldn't be shown on window
during fullscreen mode. When window is going into normal mode from fullscreen,
then display of border should be determined by its borderless state.

1. client border should be shown when window is going into normal mode from fullscreen with borderless state.
2. client border shouldn't be shown when window is going into normal mode from fullscreen with border state.
3. and also client border shouldn't be shown when window is fullscreen mode.

@fix

Test Plan:
1. run elementary_test in wayland server
2. run window states
3. select borderless
4. select fullscreen
5. unselect fullscreen
6. unselect borderless

Reviewers: raster, devilhorns, seoz

Differential Revision: https://phab.enlightenment.org/D988