I posted relevant information. The reason is a complete re-design of the theme to squeeze the maximum potential of IPS 4.5. Reconfiguration is required when upgrading from IPS 4.4 to IPS 4.5.
The beta will end when the beta of IPS 4.5 also ends, but I find the theme version 3.0.0 Beta 2 very stable. Future beta versions will rather contain bug fixes.
The code is correct. Check for JS errors in the console, as this function will use JS and may lockout if any code fails.
It does not open a new window, but when you click on the link, you have the effect of moving the screen on the mobile.
If you want change text color:
#elSearch input[type="search"]::placeholder {
color: #fff;
}
If you want change background color and the color of the text being entered:
#elSearch input[type="search"] {
background-color: #fff;
color: #fff;
}