navigation_layout: set efl.content y-axis align to 0.0
Summary:
If `efl.content` min size is greater than edc area size, `efl.bar` and
`efl.content` are overlapped because default y-align is 0.5.
This patch avoid it.
Test Plan:
Sample code:
```
// gcc -o efl_ui_stack_example efl_ui_stack_example.c `pkg-config --cflags --libs elementary`
EAPI_MAIN void
efl_main(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
{
Eo *win = efl_add(EFL_UI_WIN_CLASS, efl_main_loop_get());
Eo *stack = efl_add(EFL_UI_STACK_CLASS, win);
efl_content_set(win, stack);
Eo *nl = efl_add(EFL_UI_NAVIGATION_LAYOUT_CLASS, stack,
efl_ui_stack_push(stack, efl_added));
Eo *bn = efl_add(EFL_UI_NAVIGATION_BAR_CLASS, stack);
efl_text_set(bn, "Title Text");
efl_ui_navigation_layout_bar_set(nl, bn);
Eo *btn = efl_add(EFL_UI_BUTTON_CLASS, nl,
efl_text_set(efl_added, "Button 1"),
efl_gfx_hint_size_min_set(efl_added, EINA_SIZE2D(50, 80)),
efl_content_set(nl, efl_added));
efl_gfx_entity_size_set(win, EINA_SIZE2D(100, 80));
}
EFL_MAIN()
```
Reviewers: Jaehyun_Cho
Reviewed By: Jaehyun_Cho
Subscribers: cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D8868
a47f062633