support editing custom certs (merge upstream PR NginxProxyManager#4425 by @rumansaleem)

Author: Zoey2936

frontend/js/i18n/de-lang.json

@@ -79,7 +79,7 @@
     "download": "Herunterladen",
     "empty": "Es gibt keine TLS-Zertifikate",
     "force-renew": "Jetzt erneuern",
-    "form-title": "Hinzufügen {provider, select, letsencrypt{Certbot} other{Custom}} Zertifikat",
+    "form-title": "{id, select, undefined{Neues Zertifikat} other{Zertifikat bearbeiten}}",
     "help-content": "TLS-Zertifikate (früher bekannt als SSL-Zertifikate) sind eine Art Verschlüsselungsschlüssel, mit dem Ihre Website für die:den Endbenutzer:in verschlüsselt werden kann.\nNPMplus verwendet standardmäßig einen Dienst namens Let's Encrypt, um kostenlos TLS-Zertifikate auszustellen.\nWenn Sie persönliche Informationen, Passwörter oder sensible Daten hinter NPM haben, ist es wahrscheinlich eine gute Idee, ein Zertifikat zu verwenden.\nNPMplus unterstützt auch die DNS-Authentifizierung, wenn Sie Ihre Website nicht mit dem Internet verbinden oder wenn Sie nur ein Platzhalterzertifikat benötigen.",
     "help-title": "TLS-Zertifikate",
     "in-use": "In Verwendung",

frontend/js/i18n/en-lang.json

@@ -79,7 +79,7 @@
     "download": "Download",
     "empty": "There are no TLS Certificates",
     "force-renew": "Renew Now",
-    "form-title": "Add {provider, select, letsencrypt{Certbot} other{Custom}} Certificate",
+    "form-title": "{id, select, undefined{Add} other{Edit}} {provider, select, letsencrypt{Let's Encrypt} other{Custom}} Certificate",
     "help-content": "TLS certificates (previously known as SSL Certificates) are a form of encryption key which allows your site to be encrypted for the end user.\nNPMplus uses by default a service called Let's Encrypt to issue TLS certificates for free.\nIf you have any sort of personal information, passwords, or sensitive data behind NPMplus, it's probably a good idea to use a certificate.\nNPMplus also supports DNS authentication for if you're not running your site facing the internet, or if you just want a wildcard certificate.",
     "help-title": "TLS Certificates",
     "in-use"  : "In use",

frontend/js/i18n/it-lang.json

@@ -79,7 +79,7 @@
     "download": "Scarica",
     "empty": "Non ci sono certificati TLS",
     "force-renew": "Rinnova ora",
-    "form-title": "Aggiungi un certificato {provider, select, letsencrypt{Certbot} other{Custom}}",
+    "form-title": "{id, select, undefined{Nuovo} other{Modifica}} un certificato {provider, select, letsencrypt{Certbot} other{Custom}}",
     "help-content": "I certificati TLS (noti precedentemente come certificati SSL) sono una forma di chiave di crittografia che consente la crittografia del tuo sito per l'utente finale.\nNPMplus utilizza di default un servizio chiamato Let's Encrypt per rilasciare gratuitamente certificati TLS.\nSe NPMplus protegge informazioni personali, password o dati sensibili, probabilmente è una buona idea utilizzare un certificato.\nNPMplus supporta anche l'autenticazione DNS nel caso in cui il tuo sito non sia accessibile da Internet o se desideri semplicemente un certificato wildcard.",
     "help-title": "Certificati TLS",
     "in-use"  : "In uso",

frontend/js/i18n/zh-lang.json

@@ -79,7 +79,7 @@
     "download": "下载",
     "empty": "没有TLS证书",
     "force-renew": "立即续订",
-    "form-title": "添加{provider, select, letsencrypt{Certbot} other{自定义}}证书",
+    "form-title": "{id, select, undefined{新建} other{编辑}}{provider, select, letsencrypt{Certbot} other{自定义}}证书",
     "help-content": "TLS证书（SSL证书）是一种加密密钥，可为最终用户加密您的站点。\nNPMplus默认使用名为Let's Encrypt的服务免费颁发TLS证书。\n如果NPMplus后面有任何个人信息、密码或敏感数据，使用证书可能是个好主意。\nNPMplus还支持DNS认证，适用于您的站点不面向互联网运行或您只需要通配符证书的情况。",
     "help-title": "TLS证书",
     "in-use": "使用中",