Make use of shorten instrument check/comparison calls

src/qml/MainScore.qml

@@ -41,7 +41,7 @@ Score {
   scoreObj.enableDoubleAccidentals: GLOB.enableDoubleAccids
   scoreObj.enharmNotesEnabled: GLOB.showEnharmNotes
   scoreObj.bgColor: activPal.base
-  scoreObj.enableTechnical: GLOB.instrument.type === Tinstrument.Bandoneon
+  scoreObj.enableTechnical: GLOB.instrument.bandoneon
 
   TmainScoreObject {
     id: mainObj

src/qml/instruments/Instrument.qml

@@ -46,7 +46,7 @@ Flickable {
       instrument = Qt.createComponent("qrc:/instruments/" +  GLOB.instrument.qmlFile + ".qml").createObject(sizable)
     else
       instrument = null
-    if (GLOB.instrument.type === Tinstrument.Piano)
+    if (GLOB.instrument.piano)
       instrument.setAmbitus(score.scoreObj.lowestNote(), score.scoreObj.highestNote())
     NOO.instrument = instrument
     if (instrument && !GLOB.instrument.isSax)
@@ -55,7 +55,7 @@ Flickable {
 
   Connections {
     target: score
-    enabled: GLOB.instrument.type === Tinstrument.Piano
+    enabled: GLOB.instrument.piano
     onClefChanged: instrument.setAmbitus(score.scoreObj.lowestNote(), score.scoreObj.highestNote())
   }
 }

src/qml/settings/InstrumentPage.qml

@@ -50,7 +50,7 @@ Flickable {
                   else
                     setTuning(NOO.tuning(Ttune.Standard_EADGBE))
                   fretsNrSpin.value = ins.fretNumber
-              } else if (ins.type === Tinstrument.NoInstrument) {
+              } else if (ins.none) {
                   setTuning(NOO.tuning(score.scoreObj.lowestNote(), score.scoreObj.highestNote(), NOO.emptyNote(), NOO.emptyNote(), NOO.emptyNote(), NOO.emptyNote()))
               }
           }
@@ -92,7 +92,7 @@ Flickable {
             id: tuningCombo
             visible: instrSel.instrument !== 0
             width: NOO.factor() * 18
-            model: GLOB.instrument.type === Tinstrument.BassGuitar ? NOO.bassTunings() : NOO.guitarTunings()
+            model: GLOB.instrument.bassGuitar ? NOO.bassTunings() : NOO.guitarTunings()
           }
         }
         Item {
@@ -215,7 +215,7 @@ Flickable {
                                  GLOB.tuning.string(4), GLOB.tuning.string(5), GLOB.tuning.string(6)))
             tuningCombo.currentIndex = tuningCombo.count - 1
         } else {
-            tuningCombo.currentIndex = GLOB.tuning.type - (GLOB.instrument.type === Tinstrument.BassGuitar ? 100 : 0)
+            tuningCombo.currentIndex = GLOB.tuning.type - (GLOB.instrument.bassGuitar ? 100 : 0)
             setTuning(NOO.tuning(GLOB.tuning.type))
         }
       }