ui: named FCI block holds the metadata; hide the empty content pane (v2.7.13)

- pysimFsInfoHtml puts the FID/type/size line inside the fieldset, so the
  selected file is one bordered block with its symbolic name in the border;
  files without an FCI keep the plain borderless line.
- The content pane starts hidden and is synced after every mutation
  (selection clears it, read success shows it, read failure keeps it hidden,
  edit/cancel re-sync): no empty box before a read or edit.
- tests: FCI ordering assertions; new fs_read.test.js (visibility helper,
  read success/failure/throw, markup + call sites); fs_edit extraction.

pysim_simple_server/server.py

@@ -26,7 +26,7 @@ from osmocom.tlv import BER_TLV_IE
 from osmocom.utils import rpad
 
 
-VERSION = '2.7.12'
+VERSION = '2.7.13'
 
 MAX_ENVELOPE_SEGMENTS = 5  # max SMS segments for outgoing C-APDU in ENVELOPE