-Increase the height with the borders width.
(drop portion calculates the height by own, but width is right)
-Avoid caching when there is a border, because caching work
with height and it can happen that border change, but height not.
-Avoid drop portion height when calculate the line height
(except when there is only one line)
-Drop portion has an own font, so we have to use this
font when change the cursor position.
-When painting text, use the current drop portion
part width.

Change-Id: I3d8f4ef9e6f067e28827453f9b6412184943b72e