webui: fix ignoring exact key matches

see #2544

use updated class method for comparison
same prefix did not work with exact lengths

code/espurna/settings_helpers.h

@@ -289,11 +289,7 @@ private:
 namespace query {
 
 inline bool samePrefix(StringView key, StringView prefix) {
-    if (key.length() > prefix.length()) {
-        return strncmp_P(key.c_str(), prefix.c_str(), prefix.length()) == 0;
-    }
-
-    return false;
+    return key.startsWith(prefix);
 }
 
 struct StringViewIterator {

code/espurna/ws.cpp

@@ -622,11 +622,11 @@ void _wsParse(AsyncWebSocketClient *client, uint8_t * payload, size_t length) {
 }
 
 bool _wsOnKeyCheck(espurna::StringView key, const JsonVariant&) {
-    return espurna::settings::query::samePrefix(key, STRING_VIEW("ws"))
-        || espurna::settings::query::samePrefix(key, STRING_VIEW("adminPass"))
-        || espurna::settings::query::samePrefix(key, STRING_VIEW("hostname"))
-        || espurna::settings::query::samePrefix(key, STRING_VIEW("desc"))
-        || espurna::settings::query::samePrefix(key, STRING_VIEW("webPort"));
+    return (key == STRING_VIEW("adminPass"))
+        || (key == STRING_VIEW("hostname"))
+        || (key == STRING_VIEW("desc"))
+        || (key == STRING_VIEW("webPort"))
+        || key.startsWith(STRING_VIEW("ws"));
 }
 
 void _wsOnConnected(JsonObject& root) {