cmake-gui: Use the QStandardItemModel workaround until 5.1.0.

If there is a Qt 5.0.3 release, it may or may not contain the patch
that fixes this issue.

 http://thread.gmane.org/gmane.comp.lib.qt.releasing/882

Just use the workaround until 5.1.0 which certainly will contain the
fix. Don't use the workaround before Qt 5.0.0.
Merge topic 'expand-version-of-Qt5-gui-fix' into next

6387f6d cmake-gui: Use the QStandardItemModel workaround until 5.1.0.
Merge topic 'fix-java-jar-depends'

adeafad UseJava.cmake: accept jar targets in add_jar
53a05b8 UseJava.cmake: fix passing jars to add_jar
45c8e4b UseJava.cmake: simplify path logic
Merge topic 'fix-genex-preprocess'

7a619fa Fix cmGeneratorExpression::Preprocess for interleaved inputs.
Merge topic 'Ruby-version-selection'

d7e05e4 FindRuby: improve version selection
Merge topic 'FindImageMagick-v6.8.0-8'

dbd895b FindImageMagick: Search versioned suffixes (#14012)
Merge topic 'expand-version-of-Qt5-gui-fix'

6387f6d cmake-gui: Use the QStandardItemModel workaround until 5.1.0.
Merge branch 'master' into next