EHttpRequest: Avoid possible data stream memory leak

The request's finish function is not called in case when the request
is cancelled, which meant that the whole data stream was leaked.
update Punjabi Translation for 3.10 branch
Bug 723377 - Add alternate zoom shortcuts

The zoom in shortcut (Ctrl+) can be confusing for some users because on
keyboards with a [+ =] key the '+' requires holding Shift.  To mitigate
the confusion, also accept (Ctrl=) for zoom in.

And while we're add it, also support Ctrl+ and Ctrl- on keypads, as well
as keyboards with dedicated Zoom In / Zoom Out keys.

(cherry picked from commit 8924b0bd5ef04c30ed3a43652e70e583407f7b85)
Bug #721639 - Cannot overwrite builtin mail view definitions
updated kn.po