KDLs screen paging overwrites first two lines of subsequent pages

[idefix]

When you get into the KDL you'll be greeted with the following screen:

Requesting help, gets you the first help-page:

You'll notice the two blank lines after the first row overwriting the Welcome... and Thread... rows. The kdebug> prompt is not overwritten however.

The next page doesn't continue after the two blank lines, but right after the first line (notice that this page has not been fully written to the screen yet):

When the page has been fully written, the two blank lines now cover the first two lines of this new page as indicated by the red bounding rectangle:

From then on, every page has it's first two lines overwritten by the two blank lines.

[idefix]

Welcome screen of KDL

[idefix]

first page of KDL help text

[idefix]

second page gets written to screen

[idefix]

second page of KDL help text fully written to screen

[mmlr]

Yep, annoyed me a few times already. Fixed in hrev31865.