fix find_element

Fixed set_all

Update element.py: box_model, size, location, rect, get_attribute, is_displayed, is_enabled, is_selected, is_clickable

property 'current_url' for tab

Print profile removal message only when actually removed

fix headless user agent and wrong placed print statement

element.get_position: Don't raise when empty `quads`

Fix cookiejar set all

find_chrome_executable: Search `PATH` in order