Adds a simple QSortFilterProxyModel on top of TimeZonesModel and
reimplements filterAcceptsRow using QStringMatcher (supposedly faster
according to qtdocs).
REVIEW: 123740
BUG: 346681
FIXED-IN: 5.3.1
This was added for KDeclarative 5.9 which we already depend on, so let's
just use it. Battery applet already does.
Backports parts of f5a177b6fa
BUG: 347032
FIXED-IN: 5.3.1
Not all zones have '/' so the splitting may not result in list of two
entries. Use last() instead of at(1) to avoid possible out of bounds
assert.
BUG: 339411
Still has couple missing features:
* no time in the tooltip yet (needs larger refactor)
* no order selection
* no default timezone (but last used is always saved)
* couple minor issues
REVIEW: 120314
CCBUG: 337564
Martin Klapetek
Lukáš Tinkl
Montel Laurent
Jonathan Riddell
Kai Uwe Broulik