Refactor UI elements for consistency and clarity

- Updated action buttons across multiple files to use icons (e.g., "Save" to "💾+", "Delete" to "X").
- Replaced "Cancel" button text with a left arrow (←) for a more intuitive navigation experience.
- Removed unnecessary action columns from tables to streamline the interface.
- Enhanced table rows to be clickable for better user interaction, redirecting to relevant management pages.
- Adjusted font sizes and styles in CSS for improved readability and aesthetics.
- Standardized back button functionality to use a left arrow across various pages.

firmwaretool.php

@@ -36,7 +36,7 @@ if (isset($_GET['equipmentID'])){$returnpage = 'equipment&equipmentID='.$_GET['e
 if (isAllowed('dashboard',$_SESSION['profile'],$_SESSION['permission'],'R') != 0){
   $view .= '
       <div class="content-header responsive-flex-column pad-top-5">
-          <a href="index.php?page='.$returnpage.'" class="btn">'.$button_cancel.'</a>
+          <a href="index.php?page='.$returnpage.'" class="btn">←</a>
       </div>
   ';
 }