Release v0.3.0: move settings into an on-demand single-instance configurator

src/app.h

@@ -43,6 +43,7 @@ class App
     std::atomic<ULONGLONG> pauseUntil{0};
     HWND pasteTarget{};
     HWND hotkeyCapture{};
+    DWORD hotkeyCaptureProcess{};
     HWND logWindow{};
     std::mutex stateMutex;
     Run run;
@@ -66,6 +67,8 @@ class App
     bool registerHotkeys(const Settings &, bool rollback = false);
     void applySettings(const Settings &);
     void reloadLayouts();
+    void clearHistory();
+    void setHotkeyCapture(HWND);
     bool isHotkey(DWORD, UINT);
     void keyboard(const KBDLLHOOKSTRUCT &, UINT modifiers);
     bool handleKeyboard(const KBDLLHOOKSTRUCT &, bool down, UINT modifiers);