imgui/renderer: Hide Cursor on Idle Implementation (#1266)

Implement hide cursor on idle w/ idle timeout duration (configurable via GUI). While at it add always and never to hide the cursor options as well.

* Revert commit #1211 as to not interfere with the cursor states.
* Make hide cursor on idle as the default setting w/ timeout duration of 5 seconds to hide.
* Add an input tab in the settings page to add the hide cursor setting, with hiding the idle timeout box with respect to the cursor hide option.

Co-authored-by: georgemoralis <giorgosmrls@gmail.com>

src/common/config.h

@@ -8,6 +8,9 @@
 #include "types.h"
 
 namespace Config {
+
+enum HideCursorState : s16 { Never, Idle, Always };
+
 void load(const std::filesystem::path& path);
 void save(const std::filesystem::path& path);
 
@@ -16,6 +19,9 @@ bool isFullscreenMode();
 bool getPlayBGM();
 int getBGMvolume();
 
+s16 getCursorState();
+int getCursorHideTimeout();
+
 std::string getLogFilter();
 std::string getLogType();
 std::string getUserName();
@@ -51,6 +57,8 @@ void setScreenHeight(u32 height);
 void setFullscreenMode(bool enable);
 void setPlayBGM(bool enable);
 void setBGMvolume(int volume);
+void setCursorState(s16 cursorState);
+void setCursorHideTimeout(int newcursorHideTimeout);
 void setLanguage(u32 language);
 void setNeoMode(bool enable);
 void setUserName(const std::string& type);