Search: Skip spaces and control characters, code cleanup, fix minor issue on desktop

Common/Data/Encoding/Utf8.cpp

@@ -387,7 +387,13 @@ std::string NormalizeForSearch(std::string_view input) {
 	while (index < size) {
 		uint32_t codepoint = u8_nextchar(input.data(), &index, size);
 
+		// Skip spaces and control characters.
+		if (codepoint <= 0x20) {
+			continue;
+		}
+
 		// 1. Convert Fullwidth Roman/Numbers to ASCII
+		// These are common in Japanese game names.
 		// Range: U+FF01 (！) to U+FF5E (～)
 		if (codepoint >= 0xFF01 && codepoint <= 0xFF5E) {
 			codepoint -= 0xFEE0;

Core/KeyMap.cpp

@@ -212,6 +212,7 @@ void UpdateNativeMenuKeys() {
 	RemoveKeyboardLetterKeys(tabRight);
 	RemoveKeyboardLetterKeys(confirmKeys);
 	RemoveKeyboardLetterKeys(cancelKeys);
+	RemoveKeyboardLetterKeys(infoKeys);
 
 	SetDPadKeys(upKeys, downKeys, leftKeys, rightKeys);
 	SetConfirmCancelKeys(confirmKeys, cancelKeys);

UI/MainScreen.cpp

@@ -515,18 +515,13 @@ void MainScreen::CreateViews() {
 
 bool MainScreen::key(const KeyInput &key) {
 	if (key.flags & KeyInputFlags::DOWN) {
-		if (key.keyCode == NKCODE_CTRL_LEFT || key.keyCode == NKCODE_CTRL_RIGHT)
-			searchKeyModifier_ = true;
-		if (key.keyCode == NKCODE_F && searchKeyModifier_ && System_GetPropertyBool(SYSPROP_HAS_TEXT_INPUT_DIALOG)) {
+		if (key.keyCode == NKCODE_F && (key.flags & KeyInputFlags::MOD_CTRL) && System_GetPropertyBool(SYSPROP_HAS_TEXT_INPUT_DIALOG)) {
 			auto se = GetI18NCategory(I18NCat::SEARCH);
 			System_InputBoxGetString(GetRequesterToken(), se->T("Search term"), searchFilter_, false, [&](const std::string &value, int) {
 				searchFilter_ = StripSpaces(value);
 				searchChanged_ = true;
 			});
 		}
-	} else if (key.flags & KeyInputFlags::UP) {
-		if (key.keyCode == NKCODE_CTRL_LEFT || key.keyCode == NKCODE_CTRL_RIGHT)
-			searchKeyModifier_ = false;
 	}
 
 	bool retval = UIBaseScreen::key(key);

UI/MainScreen.h

@@ -92,7 +92,6 @@ protected:
 	bool lockBackgroundAudio_ = false;
 	bool lastVertical_ = false;
 	bool confirmedTemporary_ = false;
-	bool searchKeyModifier_ = false;
 	bool searchChanged_ = false;
 	std::string searchFilter_;