Progress!

Masked error caused by saving dbc while editor is open that causes
msg IDs to go crazy by making editor modal, but that affects all
other windows, so might be a better fix.

Added new value type of VALUE_STRING, probably better named
ENUMERATED_STRING, and it uses the table in the editor to define
the enum.

Fixed a bug in the signal viewer load when a signal is not matched
(I found it by renaming a signal and then loading)

dbc/dbchandler.cpp

@@ -576,6 +576,9 @@ DBC_SIGNAL* DBCFile::parseSignalLine(QString line, DBC_MESSAGE *msg)
             sig.valType = DP_FLOAT;
             sig.intelByteOrder = true;
             break;
+        case 7: //double point float in little endian
+            sig.valType = VALUE_STRING;
+            break;
         }
         sig.factor = match.captured(6 + offset).toDouble();
         sig.bias = match.captured(7 + offset).toDouble();
@@ -1443,6 +1446,9 @@ bool DBCFile::saveFile(QString fileName)
             case STRING:
                 msgOutput.append("4-");
                 break;
+            case VALUE_STRING:
+                msgOutput.append("7-");
+                break;
             default:
                 msgOutput.append("0-");
                 break;