Add meaningful error message if file too large.

[cip]

If file is too large (>2GB ) currently error message is "bad address".
Replace this by something meaningful. (File to large, split as described on ...).
See also related issue 60. (About removal of 2GB limit on S^3, if this is implemented the error message then should only be displayed on the Symbian 5th edition or erlier.)

[cip]

Implemented in commit 0579fc2
(And thus since v1.1.11)

Further improvement could make sense for WikiOnBoard 2 (E.g. dialog box to directly go to web page with instruction).
At least text needs to be fixed (mentions inexistent "help" page).
Note, however at least on Belle >2GB are working (<4gb enfored by fat32), so message only required for anna (if at all).
Therefore low prio to fix.
See issue 60 for details.

[cip]

Updated for WikiOnBoard 2 in 3ede7f6 (and preceeding commit).

Basically only text moved to qml part.
Kept open, because although low priority a useability improvement would be good.