Fix bug #5387832 [UI/Visual] Address of the website is not displayed...

Fix bug #5387832 [UI/Visual] Address of the website is not displayed properly(second line of the address is partly shown)

- finally get ride of VERY_WIDE constant ...
- compute the text width on the fly (we cannot cache it as the paint properties can be changed)

Change-Id: I07a0df15202ad3f61eabf62da9658fc301422be7