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

testing/keyboard_controls/data/graph_tests.cpp

@@ -0,0 +1,157 @@
+
+#define GRAPH_TESTS
+
+// TEST: Move Focus between nodes
+// START ----------------------------------------------------------------------
+
+class X;
+class Y;
+class Z;
+
+class A
+{
+	int a;
+	int b;
+};
+
+class B : public A // <- ACTION: Activate B
+{
+	X* x;
+	Y* y;
+	Z* z;
+};
+
+class C : public B
+{
+	int e;
+};
+
+class D
+{
+	B b;
+};
+
+// ACTION: Press Tab
+// RESULTS:
+// - graph view is focused
+// - Node 'B' is focused
+
+// ACTION: Use WASD for navigation
+// RESULTS:
+// - Focus is moved between nodes
+// - Going down from 'B' focuses it's members
+// - Going up from 'C' focuses 'B's members
+
+// ACTION: Use HJKL for navigation
+// RESULTS: same as above
+
+// ACTION: Use arrow keys for navigation
+// RESULTS: same as above
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Move Focus between edges
+// START ----------------------------------------------------------------------
+
+// ACTION: Hold Shift and use WASD for navigation
+// RESULTS:
+// - Focus is moved between edges
+// - Focus is moved to node if no more edges in that direction
+
+// ACTION: Hold Shift and use HJKL for navigation
+// RESULTS: same as above
+
+// ACTION: Hold Shift and use arrow keys for navigation
+// RESULTS: same as above
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Moving focus beyond viewport centers focus
+// START ----------------------------------------------------------------------
+
+// ACTION: Drag classes far apart
+// ACTION: Zoom in so not all nodes are visible
+// ACTION: Navigate focus with keyboard
+// RESULT: View is panned when focused node is outside of the viewport
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Expand/collapse nodes
+// START ----------------------------------------------------------------------
+
+// ACTION: Move focus on class 'A'
+// ACTION: Hold Shift and press Enter/E
+// RESULT: 'A' is expanded
+
+// ACTION: Move focus to 'A::a'
+// ACTION: Hold Shift and press Enter/E
+// RESULTS:
+// - 'A' is collapsed
+// - 'A' is focused
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Activate node
+// START ----------------------------------------------------------------------
+
+// ACTION: Move focus on class 'D'
+// ACTION: Press Enter/E
+// RESULT: 'D' is activated
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Activate node in new Tab
+// START ----------------------------------------------------------------------
+
+// ACTION: Move focus on 'D::b'
+// ACTION: Hold Ctrl/CMD + SHIFT and press Enter/E
+// RESULT: 'D::b' is opened in new tab
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Activate edge
+// START ----------------------------------------------------------------------
+
+B b; // <- ACTION: activate 'B'
+
+// ACTION: Move focus on type use 'b -> B'
+// ACTION: Press Enter/E
+// RESULT: edge is activated
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Activate aggregation edge
+// START ----------------------------------------------------------------------
+
+// ACTION: Move focus on aggregation 'D -> B'
+// ACTION: Press Enter/E
+// RESULT: aggregation edge is activated
+
+// END ------------------------------------------------------------------------
+
+
+
+// TEST: Expand bundle node
+// START ----------------------------------------------------------------------
+
+// ACTION: Move focus on 'Non-indexed Symbols' bundle
+// ACTION: Press Enter/E
+// RESULTS:
+// - bundle is split
+// - focus is moved to active symbol
+
+// END ------------------------------------------------------------------------