First working implementation of Inputs Mapping

Management of inputs in Control, Management of callbacks creator per input in Source, Saving and Loading in Session, Unified renaming of SourceCallbacks, User interface window for creating and editing input mapping from Keyboard and Numerical keypad, with appropriate Settings.

UserInterfaceManager.h

@@ -72,6 +72,8 @@
 #define SHORTCUT_OUTPUT       CTRL_MOD "D"
 #define TOOLTIP_TIMER         "Timer "
 #define SHORTCUT_TIMER        CTRL_MOD "T"
+#define TOOLTIP_INPUTS        "Inputs mapping"
+#define SHORTCUT_INPUTS       CTRL_MOD "I"
 #define TOOLTIP_FULLSCREEN    "Fullscreen "
 #define SHORTCUT_FULLSCREEN   CTRL_MOD "Shift+F"
 #define TOOLTIP_MAIN          "Main menu "
@@ -354,6 +356,28 @@ public:
     bool Visible() const override;
 };
 
+class InputMappingInterface : public WorkspaceWindow
+{
+    std::array< std::string, 2 > input_mode;
+    std::array< uint, 2 > current_input_for_mode;
+
+    uint current_input_;
+
+    Source *ComboSelectSource(Source *current = nullptr);
+    uint ComboSelectCallback(uint current);
+    void SliderParametersCallback(SourceCallback *callback);
+
+public:
+    InputMappingInterface();
+
+    void Render();
+    void setVisible(bool on);
+
+    // from WorkspaceWindow
+    bool Visible() const override;
+};
+
+
 
 class UserInterface
 {
@@ -388,6 +412,7 @@ public:
     uint64_t Runtime() const;
 
     // status querries
+    inline bool keyboardAvailable() const { return keyboard_available; }
     inline bool ctrlModifier() const { return ctrl_modifier_active; }
     inline bool altModifier() const  { return alt_modifier_active; }
     inline bool shiftModifier() const  { return shift_modifier_active; }
@@ -408,6 +433,7 @@ protected:
     bool ctrl_modifier_active;
     bool alt_modifier_active;
     bool shift_modifier_active;
+    bool keyboard_available;
     bool show_vimix_about;
     bool show_imgui_about;
     bool show_gst_about;
@@ -428,6 +454,7 @@ protected:
     SourceController sourcecontrol;
     OutputPreview outputcontrol;
     TimerMetronome timercontrol;
+    InputMappingInterface inputscontrol;
     HelperToolbox helpwindow;
 
     void showMenuFile();