g-t-e: extend sleep in one test, add in another

aarch64 looks like it often needs more time to settle after
restoring from snapshot before trying a key combo.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/applications/gnome-text-editor/new_file.pm

@@ -11,7 +11,7 @@ sub run {
     my $self = shift;
     
     # First we will use key combo to open the new document window.
-    sleep 2;
+    sleep 5;
     send_key("ctrl-t");
     assert_screen "gte_new_document_opened";
 

tests/applications/gnome-text-editor/show_shortcuts.pm

@@ -7,7 +7,9 @@ use utils;
 
 sub run {
     my $self = shift;
-    
+    # wait for snapshot restore to settle
+    sleep 5;
+
     # Open Shortcuts.
     send_key("ctrl-?");