ui: Keyboard controls (#935)

* switch focus between views with Tab
* move focus within views with WASD/HJKL/Arrows
* move focus between graph edges by holding Shift
* move focus between code references by holding Shift
* removed graph panning with WASD and moved zooming to Alt + W/S
* removed graph navigation by pressing starting character in graph view lists
* changed local reference and custom trail shortcuts
* updated Keyboard Shortcuts window
* use common back and forward shortcuts and YZ & Shift + YZ
* fix macOS issue where widgets don't get proper focus after creating a new tab
* don't use shared_ptr in QtMainView

fixes #486, #327, #214, #210

src/lib_gui/qt/element/code/QtCodeNavigateable.h

@@ -3,6 +3,7 @@
 
 #include <set>
 
+#include "CodeFocusHandler.h"
 #include "CodeScrollParams.h"
 #include "CodeSnippetParams.h"
 #include "types.h"
@@ -28,14 +29,21 @@ public:
 		const FilePath& filePath,
 		size_t lineNumber,
 		Id locationId,
+		Id scopeLocationId,
 		bool animated,
-		CodeScrollParams::Target target) = 0;
+		CodeScrollParams::Target target,
+		bool focusTarget) = 0;
 
 	virtual void onWindowFocus() = 0;
 
 	virtual void findScreenMatches(
 		const std::wstring& query, std::vector<std::pair<QtCodeArea*, Id>>* screenMatches) = 0;
 
+	virtual void setFocus(Id locationId) = 0;
+	virtual void setFocusOnTop() = 0;
+	virtual void moveFocus(
+		const CodeFocusHandler::Focus& focus, CodeFocusHandler::Direction direction) = 0;
+
 protected:
 	void ensureWidgetVisibleAnimated(
 		const QWidget* parentWidget,