fix: factor in monitor scaling for application library (#277)

This addresses the problem where the application library is too large
when a scaling factor is applied.

To fix this, we get the scale factor and apply to the height and width:

    monitorScale = 1/St.ThemeContext.get_for_stage(global.stage).scale_factor;
    height = Math.floor(monitorScale*monitor.height*.5 / 168) * 168
    width = Math.ceil(monitorScale*monitor.width*.6 / 168) * 168

Fixes #290.

applications.js

@@ -1148,10 +1148,11 @@ var CosmicAppsDialog = GObject.registerClass({
 
         // Resize Scroll View in App Display based on monitor dimensions
         const monitor = this.monitor();
-        const height = Math.floor(monitor.height*.5 / 168) * 168;
-        const width = Math.ceil(monitor.width*.6 / 168) * 168;
-        this.appDisplay.resize(height, width);
+        const monitorScale = 1/St.ThemeContext.get_for_stage(global.stage).scale_factor;
+        const height = Math.floor(monitorScale*monitor.height*.5 / 168) * 168;
+        const width = Math.ceil(monitorScale*monitor.width*.6 / 168) * 168;
 
+        this.appDisplay.resize(height, width);
         this.appDisplay.reset();
 
         // Update 'checked' state of Applications button