Fix circuit load error and remove unnecessary submenu

- Add missing inputCount (4) to VCVS element in lfr.txt, which
  caused a NumberFormatException and silently skipped the element
- Remove submenu wrapper from setuplist.txt -- a single circuit
  does not need its own submenu

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: esaruoho

src/com/lushprojects/circuitjs1/public/circuits/lfr.txt

@@ -8,7 +8,7 @@ w 464 368 560 368 0
 w 560 368 560 320 0
 g 464 368 464 400 0 0
 R 464 240 464 176 0 1 40 5 0 0 0.5
-212 624 256 640 256 46 lastoutput\p(a-b)^2/(.0001*1000*(d-c)\p.00000001)*timestep
+212 624 256 640 256 46 4 lastoutput\p(a-b)^2/(.0001*1000*(d-c)\p.00000001)*timestep
 c 720 288 720 256 2 0.00009999999999999 2.035051474979456 4.01
 w 624 320 608 320 0
 w 608 320 608 400 0

src/com/lushprojects/circuitjs1/public/setuplist.txt

@@ -436,9 +436,7 @@ ccdiff.txt Current Differentiator
 ccint.txt Current Integrator
 ccitov.txt Current-Controlled Voltage Source
 -
-+Loss-Free Resistor
 lfr.txt Loss-Free Resistor
--
 +Spark Gap
 spark-sawtooth.txt Sawtooth Generator
 tesla.txt Tesla Coil