some fixes

* as of slack discussion with MG, made area finding a bit more robust
* removed unused function in keypadarea
* added unit test subproject for GUI

tests/blackgui/test_blackgui.pro

@@ -0,0 +1,22 @@
+include ($$SourceRoot/config.pri)
+include ($$SourceRoot/build.pri)
+
+QT       += core testlib dbus network gui svg
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = test_blackgui
+TEMPLATE = app
+
+CONFIG   -= app_bundle
+CONFIG   += blackmisc blackcore blackgui
+CONFIG   += testcase
+
+DEPENDPATH += . $$SourceRoot/src
+INCLUDEPATH += . $$SourceRoot/src
+
+HEADERS += *.h
+SOURCES += *.cpp
+
+DESTDIR = $$BuildRoot/bin
+
+include ($$SourceRoot/libraries.pri)