Revision of help page for fchamp function (en_US).

Change-Id: Ic629c491589cb1395e30602f5a9a2a1ceda4c060
Insert the link to messagebox in section "See Also" of help pages for error and warning.

Change-Id: I79a6882d8459864a7c7c367d688bbcb9f68402b6
* Bug #12141 fixed - Remove calls to gettext in rubberbox help page examples.
                     Translation of items will be made in each language help page.

Change-Id: I29aaed04bebe00c4ac6b58a8e524761c1e2c400e
* Bug #12259 fixed - Wrong translation for "Filled" fixed in Scinotes.

Change-Id: I5e226894e6fa6af8da0f652599ebbe2039284491
Generate unique filename for handle save/load on copy. Delete it afterwards.

Change-Id: I53d6198a59ccb2fd47bc4129f7e91387ddf69f33
Use common classname wrapper for xclick/xgetmouse detection.

Change-Id: Icc28bc244deabf41e84136a19aabd30d50e395c3
Avoid blinking on plot() (no args)

Change-Id: I147dd616c3cd266018a95a9f3de4fd62afcf58c4