Refactor contact management functions and remove phpinfo.php

- Updated formatting and structure of functions in edit_contact.inc.php for better readability and consistency.
- Added comments to clarify the purpose of certain code sections, especially regarding mandant handling.
- Removed the deprecated phpinfo.php file to clean up the codebase.

module/ticketcenter/css/create_cardform.css

@@ -0,0 +1,55 @@
+:root {
+    --main-nav-width: 250px;
+    --ticket-nav-width: 200px;
+}
+
+.ticket_edit {
+    .create_cardform_content .container {
+        padding: 0px;
+    }
+}
+#area-2 {
+    padding: 0px;
+    > .container {
+        padding-left: 0px !important;
+        padding-right: 0px !important;
+    }
+}
+
+.tickets_create_cardform {
+    min-height: calc(100dvh - var(--ticket-nav-width));
+    background: var(--bg-white);
+    .create_cardform_header {
+        padding: 20px 30px 20px 30px;
+        border-bottom: 1px solid var(--border);
+        display: flex;
+        justify-content: space-between;
+        .create_cardform_header_left {
+            display: flex;
+            align-items: center;
+            gap: 10px;
+            h2 {
+                margin-bottom: 0px;
+            }
+        }
+        .create_cardform_header_right {
+            a {
+                display: block;
+            }
+        }
+    }
+    .create_cardform_body {
+        .create_cardform_content {
+            display: flex;
+            gap: 30px;
+            .create_cardform_content_left {
+                width: 50%;
+                padding: 30px;
+            }
+            .create_cardform_content_right {
+                width: 50%;
+            }
+        }
+    }
+
+}