'Ignore Changed Spaces' now also ignores spaces in line start/end

When enabling one of the 'Ignore Space' options disable the other

Add 'Ignore Changed Spaces' option

Remove obsolete code

Make 'Cancel' more responsive

Add warning message before comparing very large files

Disable auto-recompare if compare took more than 5 seconds

Restore view properly after selections compare close

Make last line always visible

End of file alignment and sync changes

Fix last line alignment blank issue

Update min CMake version as 2.8.x will be deprecated in future

Modify end-line align and sync

Fix unwanted selection when activating compared file

Fix selection compare zero line alignment info