Lots of updates:

1. Scrolling and click to set the cursor works.
2. GUI now uses Brass Mono as the font.
3. A lot of stability and other updates.

InputHandler.h

@@ -10,19 +10,19 @@
 
 // Result of translating raw input into an editor command.
 struct MappedInput {
-    bool hasCommand = false;
-    CommandId id = CommandId::Refresh;
-    std::string arg; // optional argument (e.g., text for InsertText)
-    int count = 0;   // optional repeat (C-u not yet implemented)
+	bool hasCommand = false;
+	CommandId id    = CommandId::Refresh;
+	std::string arg; // optional argument (e.g., text for InsertText)
+	int count = 0; // optional repeat (C-u not yet implemented)
 };
 
 class InputHandler {
 public:
-    virtual ~InputHandler() = default;
+	virtual ~InputHandler() = default;
 
-    // Poll for input and translate it to a command. Non-blocking.
-    // Returns true if a command is available in 'out'. Returns false if no input.
-    virtual bool Poll(MappedInput &out) = 0;
+	// Poll for input and translate it to a command. Non-blocking.
+	// Returns true if a command is available in 'out'. Returns false if no input.
+	virtual bool Poll(MappedInput &out) = 0;
 };
 
 #endif // KTE_INPUT_HANDLER_H