Add option to disable ctrl+<mouse-wheel> zooming

The built-in behavior of Ctrl+<Mouse Wheel> to zoom in/out the terminal
can not be disabled. This patch adds an option to disable this
behavior. (Default to the original behavior).

Original patch by Yichao Yu yyc1992@gmail.com
I made some changes - bugs are mine as usual
REVIEW: 107281
FIXED-IN: 4.11
GUI:
Implement Shift+click to extend selection

Add ability to press Shift+Click to extend the mouse selection.  In
KDE3 there was the menu option to 'Set Selection End' which this mimics.

REVIEW: 107566
FIXED-IN: 4.11
BUG: 123755
Port to feature_summary
Revert "Port to feature_summary"

The port to feature_summary is going to be painful if every module depends on obsolete kdelibs versions.
set_package_properties depends on cmake 2.8.6 and KDE4internal_FOUND is set only in kdelibs 4.9.4

This reverts commit 46db8de124169d215319849b981ccdad6fe51f23.
fix invalid xml '&amp;lt;'/'&amp;gt;' in ui file to make the string extractable+translatable
There are multiple issues w/ using <> in a .ui string - remove

There doesn't seem to be a standard on whether to use scroll or mouse
wheel. Since this feature  can be used w/ mousepad and other non-mouse
I'll use scrollwheel for now.

CCMAIL: lueck@hube-lueck.de
Fix typo: direcotry -> directory

Thanks to Pierre Buard for spotting.
SVN_SILENT made messages (.desktop file)
Pluralize the message (some languages have different plural forms for translation of quanities > 1)
Correct spelling errors/word usage

All these are in the comments - no code changes
Removing remaining problematic MenuIndex entries from profiles

CCBUG: 168530