First steps: Don't show mintdrivers button if mintdrivers isn't installed

usr/lib/linuxmint/mintwelcome/mintwelcome.py

@@ -103,6 +103,8 @@ class MintWelcome():
                 add_codecs = True
         if not add_codecs:
             builder.get_object("box_first_steps").remove(builder.get_object("box_codecs"))
+        if not os.path.exists("/usr/bin/mintdrivers"):
+            builder.get_object("box_first_steps").remove(builder.get_object("box_drivers"))
 
         # Construct the stack switcher
         list_box = builder.get_object("list_navigation")

usr/share/linuxmint/mintwelcome/mintwelcome.ui

@@ -688,7 +688,7 @@
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkBox">
+                  <object class="GtkBox" id="box_drivers">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
                     <property name="spacing">24</property>