Reduce iOS default font size.

Tweak toolbar height for mobile.

src/QmlControls/ScreenToolsController.cc

@@ -28,15 +28,18 @@
 #include "MainWindow.h"
 
 #ifdef Q_OS_WIN
-const double ScreenToolsController::_defaultFontPixelSizeRatio = 1.0;
-#elif __mobile__
-const double ScreenToolsController::_defaultFontPixelSizeRatio = 1.0;
+const double ScreenToolsController::_defaultFontPixelSizeRatio  = 1.0;
+#elif __android__
+const double ScreenToolsController::_defaultFontPixelSizeRatio  = 1.0;
+#elif __ios__
+const double ScreenToolsController::_defaultFontPixelSizeRatio  = 0.8;
 #else
-const double ScreenToolsController::_defaultFontPixelSizeRatio = 0.8;
+const double ScreenToolsController::_defaultFontPixelSizeRatio  = 0.8;
 #endif
-const double ScreenToolsController::_smallFontPixelSizeRatio = 0.75;
-const double ScreenToolsController::_mediumFontPixelSizeRatio = 1.22;
-const double ScreenToolsController::_largeFontPixelSizeRatio =  1.66;
+
+const double ScreenToolsController::_smallFontPixelSizeRatio    = 0.75;
+const double ScreenToolsController::_mediumFontPixelSizeRatio   = 1.22;
+const double ScreenToolsController::_largeFontPixelSizeRatio    = 1.66;
 
 ScreenToolsController::ScreenToolsController()
 {

src/QmlControls/SubMenuButton.qml

@@ -39,7 +39,7 @@ Button {
                 verticalAlignment:      TextEdit.AlignVCenter
                 horizontalAlignment:    TextEdit.AlignHCenter
                 color:                  showHighlight ? qgcPal.buttonHighlightText : qgcPal.buttonText
-                font.pixelSize:         ScreenTools.isMobile ? ScreenTools.defaultFontPixelSize * 0.65 : ScreenTools.defaultFontPixelSize
+                font.pixelSize:         ScreenTools.isMobile ? ScreenTools.defaultFontPixelSize * 0.75 : ScreenTools.defaultFontPixelSize
                 text:                   control.text
 
                 Rectangle {

src/ui/MainWindow.qml

@@ -40,7 +40,7 @@ Item {
 
     QGCPalette { id: __qgcPal; colorGroupEnabled: true }
 
-    property real tbHeight:         ScreenTools.isMobile ? (ScreenTools.isTinyScreen ? (mainWindow.width * 0.0666) : (mainWindow.width * 0.0444)) : ScreenTools.defaultFontPixelSize * 4
+    property real tbHeight:         ScreenTools.isMobile ? (ScreenTools.isTinyScreen ? (mainWindow.width * 0.0666) : (mainWindow.width * 0.05)) : ScreenTools.defaultFontPixelSize * 4
     property int  tbCellHeight:     tbHeight * 0.75
     property real tbSpacing:        ScreenTools.isMobile ? width * 0.00824 : 9.54
     property real tbButtonWidth:    tbCellHeight * 1.3