Auto-Type: Support multiple Xkb layouts

Completely rewritten XCB Auto-Type keymap system.

 - supports multiple simultaneous layouts
 - prefers current layout if it has all keysyms available
 - removed hardcoded KeySymMap
 - removed clunky custom KeySym emulation

Biggest breaking change is removing KeySym emulation for keys that
do not exist in any of the layouts currently in use. It would be
possible to make it work but if you are trying to type syms that
are not available in any of your layouts you are abusing it. It
also adds unnecessary complexity and opens up timing issues when
the keymap is modified on-the-fly. Now we are just reading it.

This also workarounds a Qt related issue where QX11Info::display()
returns a connection to X server that fails to receive updated
keymap data when client settings change. We use our own connection
now to get it working.

src/autotype/AutoType.cpp

@@ -496,6 +496,7 @@ AutoType::parseSequence(const QString& entrySequence, const Entry* entry, QStrin
     const int maxRepetition = 100;
 
     QList<QSharedPointer<AutoTypeAction>> actions;
+    actions << QSharedPointer<AutoTypeBegin>::create();
     actions << QSharedPointer<AutoTypeDelay>::create(qMax(0, config()->get(Config::AutoTypeDelay).toInt()), true);
 
     // Replace escaped braces with a template for easier regex