Replace a LOT of sprintf with snprintf, and a few strcpy with truncate_cpy

Common/StringUtils.cpp

@@ -242,7 +242,7 @@ std::string StringFromFormat(const char* format, ...)
 std::string StringFromInt(int value)
 {
 	char temp[16];
-	sprintf(temp, "%i", value);
+	snprintf(temp, sizeof(temp), "%d", value);
 	return temp;
 }
 
@@ -367,4 +367,4 @@ std::string UnescapeMenuString(const char *input, char *shortcutChar) {
 		}
 	}
 	return output;
-}
+}