ui: Added tabs UI to top of main window (issue #215)

* Added tab bar to top of main window with UI/shortcuts similar to web browsers
* ComponentManager offers components for 2 use-cases: application and tab
* Application components: log view (status/errors), bookmarks, screen search, status bar, tabs, tooltips, dialogs and all tab views disabled
* Tab components: graph, code, history and search
* When a project is loaded there is always at least one tab, otherwise there is none
* Each tab replaces the application views of the same name in the main layout when activated
* Each tab has it's own TaskScheduler, to process tasks independent from other tabs
* The application has a global TaskScheduler for application wide tasks
* The singloton class TaskManager is responsible for managing the TaskSchedulers
* MessageListeners and Messages hold an optional schedulerId, both must be set to only send to a specific TaskScheduler
* Bookmark buttons where split off into a separate view per tab, bookmark managemement is done in the application
* History menu processing is done by the QtMainWindow now
* Screen search is an application component, the responders are always changed to the active tab
* Plugin messages are opened in a new tab
* Symbols can be opened in a new tab via middle click/context menu in graph, code, history dropdown
* Full text index creation is mutexed now in PersistenStorage to make it fully thread-safe
* All tabs are closed when switching projects
* Tab contents are only animated when visible

fortune cookie message = Catch your lucky star!

src/lib_gui/qt/element/QtCodeNavigator.cpp

@@ -10,6 +10,7 @@
 #include "MessageShowError.h"
 #include "MessageScrollCode.h"
 #include "ResourcePaths.h"
+#include "TabId.h"
 #include "utility.h"
 
 #include "SourceLocation.h"
@@ -26,6 +27,7 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 	: QWidget(parent)
 	, m_mode(MODE_NONE)
 	, m_oldMode(MODE_NONE)
+	, m_schedulerId(TabId::ignore())
 	, m_activeTokenId(0)
 	, m_value(0)
 	, m_refIndex(0)
@@ -338,6 +340,16 @@ void QtCodeNavigator::setMode(Mode mode)
 	}
 }
 
+Id QtCodeNavigator::getSchedulerId() const
+{
+	return m_schedulerId;
+}
+
+void QtCodeNavigator::setSchedulerId(Id schedulerId)
+{
+	m_schedulerId = schedulerId;
+}
+
 const std::set<Id>& QtCodeNavigator::getCurrentActiveTokenIds() const
 {
 	return m_currentActiveTokenIds;
@@ -708,6 +720,11 @@ void QtCodeNavigator::deactivateScreenMatch(size_t matchIndex)
 	m_activeScreenMatchId = 0;
 }
 
+bool QtCodeNavigator::hasScreenMatches() const
+{
+	return !m_screenMatches.empty();
+}
+
 void QtCodeNavigator::clearScreenMatches()
 {
 	if (m_activeScreenMatchId)
@@ -847,7 +864,7 @@ void QtCodeNavigator::requestScroll(
 void QtCodeNavigator::handleScrollRequest()
 {
 	const ScrollRequest& req = m_scrollRequest;
-	if (req.filePath.empty())
+	if (req.filePath.empty() || !isVisible())
 	{
 		return;
 	}
@@ -871,6 +888,11 @@ void QtCodeNavigator::scrolled(int value)
 	MessageScrollCode(value, m_mode == MODE_LIST).dispatch();
 }
 
+void QtCodeNavigator::showEvent(QShowEvent* event)
+{
+	emit scrollRequest();
+}
+
 void QtCodeNavigator::setValue()
 {
 	QAbstractScrollArea* area = m_current->getScrollArea();