fix: disable any OPACUserCSS from koha (self-reg)

If a library has previously used the koha opac before switching to Aspen and have CSS customisations, these can interfere with some of the page scraping in Aspen and cause things to malfunction

This patch adds the optional flag to remove any css customisations on page load to the urls used in the web scraping process for self-reg

code/web/Drivers/Koha.php

@@ -277,7 +277,7 @@ function updatePatronInfo($patron, $canUpdateContactInfo, $fromMasquerade = fals
 				$loginResult = $this->loginToKohaOpac($patron);
 				if ($loginResult['success']) {
 
-					$updatePage = $this->getKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl');
+					$updatePage = $this->getKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl?DISABLE_SYSPREF_OPACUserCSS=1');
 					//Get the csr token
 					$csr_token = '';
 					if (preg_match('%<input type="hidden" name="csrf_token" value="(.*?)" />%s', $updatePage, $matches)) {
@@ -367,7 +367,7 @@ function updatePatronInfo($patron, $canUpdateContactInfo, $fromMasquerade = fals
 						$postVariables['resendEmail'] = strip_tags($_REQUEST['resendEmail']);
 					}
 
-					$postResults = $this->postToKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl', $postVariables);
+					$postResults = $this->postToKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl?DISABLE_SYSPREF_OPACUserCSS=1', $postVariables);
 
 					$messageInformation = [];
 					if (preg_match('%<div class="alert alert-danger">(.*?)</div>%s', $postResults, $messageInformation)) {
@@ -4476,7 +4476,7 @@ function selfRegister(): array {
 
 		if ($this->getKohaVersion() < 20.05) {
 			$catalogUrl = $this->accountProfile->vendorOpacUrl;
-			$selfRegPage = $this->getKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl');
+			$selfRegPage = $this->getKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl?DISABLE_SYSPREF_OPACUserCSS=1');
 			$captcha = '';
 			$captchaDigest = '';
 			$captchaInfo = [];
@@ -4540,7 +4540,7 @@ function selfRegister(): array {
 			$postFields['action'] = 'create';
 			$headers = ['Content-Type: application/x-www-form-urlencoded'];
 			$this->opacCurlWrapper->addCustomHeaders($headers, false);
-			$selfRegPageResponse = $this->postToKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl', $postFields);
+			$selfRegPageResponse = $this->postToKohaPage($catalogUrl . '/cgi-bin/koha/opac-memberentry.pl?DISABLE_SYSPREF_OPACUserCSS=1', $postFields);
 
 			$matches = [];
 			if (preg_match('%<h1>Registration Complete!</h1>.*?<span id="patron-userid">(.*?)</span>.*?<span id="patron-password">(.*?)</span>.*?<span id="patron-cardnumber">(.*?)</span>%s', $selfRegPageResponse, $matches)) {