Ride Plot Axis coloring

The legend wasted screen estate and was removed, this patch
colors the axis labels/ticks so no legend is required. This
approach could be adopted for other charts.

Also includes a fix to hide realtime view controls which
left a screen glitch because they should have been hidden.

src/MainWindow.cpp

@@ -388,6 +388,7 @@ MainWindow::MainWindow(const QDir &home) :
 
     // TRAIN WINDOW & CONTROLS
     trainWindow = new HomeWindow(this, "train", "Training");
+    trainWindow->controls()->hide();
     trainControls->addWidget(new TrainTool(this, this->home));
 
     // ANALYSIS WINDOW & CONTRAOLS