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/QtCodeFile.h

@@ -10,6 +10,7 @@
 
 #include "FilePath.h"
 
+#include "CodeFocusHandler.h"
 #include "CodeSnippetParams.h"
 
 class QtCodeArea;
@@ -50,6 +51,9 @@ public:
 	void setIsComplete(bool isComplete);
 	void setIsIndexed(bool isIndexed);
 
+	bool isCollapsed() const;
+	void toggleCollapsed();
+
 	void setMinimized();
 	void setSnippets();
 
@@ -61,6 +65,12 @@ public:
 	void findScreenMatches(
 		const std::wstring& query, std::vector<std::pair<QtCodeArea*, Id>>* screenMatches);
 
+	bool hasFocus(const CodeFocusHandler::Focus& focus) const;
+	bool setFocus(Id locationId);
+	bool moveFocus(const CodeFocusHandler::Focus& focus, CodeFocusHandler::Direction direction);
+	void focusTop();
+	void focusBottom();
+
 public slots:
 	void clickedMinimizeButton();
 	void clickedSnippetButton();