keybinds: track pressed special binds

Ignore mods only if we're processing a special bind, and only if it's pressed. Otherwise we might shadow normal key releases via ignoring mods. Fixes #3240

src/managers/KeybindManager.hpp

@@ -75,6 +75,7 @@ class CKeybindManager {
     uint32_t                  m_uLastMouseCode = 0;
 
     bool                      m_bIsMouseBindActive = false;
+    std::vector<SKeybind*>    m_vPressedSpecialBinds;
 
     int                       m_iPassPressed = -1; // used for pass