Code sprint: Close bugs

An anonymous user was kind to compile a list of easy to close bugs.

https://wiki.octave.org/Short_projects#Easy_Closes

Don’t let this effort be unhonored and close as many of them as possible :sunglasses:

In any case please remove those closed items from the wiki.

If you do not have the permissions to close a bug on Savannah, write the a comment:

CODE SPRINT: This item was open for a long time and no further progress is to be expected.  Thus it will be closed now.  If you care for this bug or you think it was a wrong decision, please write details for your argument and it can be reopened again.

And @siko1056 or someone else will take care of closing it.