1. Alt+F8 arms "Call 1st" as if a CQ had been sent.

2. "Call 1st" label turns red when armed to respond to a caller.
3. Suppress some recognizable false decodes, send them to cumulative file
   "data_dir/false_decodes.txt".
4. Reduce sleep delay in decoder() to 10 ms.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7928 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

lib/decoder.f90

@@ -61,7 +61,7 @@ subroutine multimode_decoder(ss,id2,params,nfsample)
   if(ios.ne.0) then
      nfail=nfail+1
      if(nfail.le.3) then
-        call sleep_msec(100)
+        call sleep_msec(10)
         go to 10
      endif
   endif