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.

layout/admin/css/mysyde.css

@@ -5570,6 +5570,23 @@ li#user_menu ul {
     height: auto;
 }
 
+.main_menu.main_navigation {
+    overflow-y: auto !important;
+    height: calc(100dvh - 160px - 70px) !important;
+    display: block !important;
+    width: calc(100% - 1px) !important;
+    padding-bottom: 40px !important;
+}
+
+.main_menu:nth-child(2) {
+    position: fixed !important;
+    bottom: 0 !important;
+    left: 0 !important;
+    width: 286px !important;
+    z-index: 10 !important;
+    border-top: 1px solid var(--rahmen-toggle) !important;
+}
+
 /*
 * === Specific styles for structure nav (without gray background) =============
 */

layout/frontend/b2c/dist/css/global.css

@@ -5617,6 +5617,8 @@ input#login-button:hover {
   width: 100%;
   height: 100%;
   z-index: -1;
+  background-image: url('/module/intranet/login_pic/Hamburg.jpg');
+
 }
 
 div#login-area {
@@ -11386,7 +11388,7 @@ body.login_area .login_button a {
   padding: 12px 24px 12px 48px;
   border: 1px solid var(--fc-primary);
   border-radius: 4px;
-  background-image: url("/userdata/01_Basic/03_Icons/microsoft.svg");
+  background-image: url("/module/intranet/login_pic/microsoft.svg");
   background-repeat: no-repeat;
   background-size: 20px 20px;
   background-position: 10px center;

layout/frontend/b2c/dist/fontawesome/css/solid.css

@@ -0,0 +1,19 @@
+/*!
+ * Font Awesome Free 6.7.1 by @fontawesome - https://fontawesome.com
+ * License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License)
+ * Copyright 2024 Fonticons, Inc.
+ */
+:root, :host {
+  --fa-style-family-classic: 'Font Awesome 6 Free';
+  --fa-font-solid: normal 900 1em/1 'Font Awesome 6 Free'; }
+
+@font-face {
+  font-family: 'Font Awesome 6 Free';
+  font-style: normal;
+  font-weight: 900;
+  font-display: block;
+  src: url("../webfonts/fa-solid-900.woff2") format("woff2"), url("../webfonts/fa-solid-900.ttf") format("truetype"); }
+
+.fas,
+.fa-solid {
+  font-weight: 900; }