add edit fields into propview list

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
wdg_validate returns Eina_Bool; change gui_value_set for BOOL

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
add callbacks, when change values in edit fields and redraw layout

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
add creation of property, when editing one which didn't exist before

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
Merge branch 'develop' add editable list of properties