grub-btrfs: sanitize title menu entries

Closes #198

Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>

41_snapshots-btrfs

@@ -453,6 +453,7 @@ title_format()
             if [[ "${#var}" -lt "${#title_column[${GRUB_BTRFS_TITLE_FORMAT[$key],,}]}" ]]; then # Add extra spaces if length of $var is smaller than the length of column, needed for pretty formatting
                 printf -v var "%-$(((${#title_column[${GRUB_BTRFS_TITLE_FORMAT[$key],,}]}-${#var})+${#var}))s" "${var}";
             fi
+		    var="$(sed  "s/'//g"  <(echo "${var}"))"
             title_menu+="${var}|"
             title_submenu+=" $(trim "${var}") |"
     done