Update all ExtJS doc links to 6.2.0

src/feature-grid/prepare-layout.md

@@ -90,7 +90,7 @@ Ext.onReady(function(){
 
 ![Our starting point](before.png)
 
-* We want to have a grid in the south, so let's start with the basic example from the [ExtJS Grid documentation](http://docs.sencha.com/extjs/6.0/6.0.0-classic/#!/api/Ext.grid.Panel):
+* We want to have a grid in the south, so let's start with the basic example from the [ExtJS Grid documentation](https://docs.sencha.com/extjs/6.2.0/classic/Ext.grid.Panel.html):
 
 ```js
 Ext.create('Ext.data.Store', {

src/layer-tree/add-layerstree-store.md

@@ -111,7 +111,7 @@ url: http://ows.terrestris.de/osm/service
 layers: OSM-WMS
 ```
 
-* Read the documentation for the Ext class [`Ext.tree.plugin.TreeViewDragDrop`](http://docs.sencha.com/extjs/6.0/6.0.0-classic/#!/api/Ext.tree.plugin.TreeViewDragDrop). What happens if you add this plugin to the tree?
+* Read the documentation for the Ext class [`Ext.tree.plugin.TreeViewDragDrop`](https://docs.sencha.com/extjs/6.2.0/classic/Ext.tree.plugin.TreeViewDragDrop.html). What happens if you add this plugin to the tree?
 
 * Your application should now e.g. look like this:
 

src/layer-tree/create-tree-panel.md

@@ -6,7 +6,7 @@ Since we want to use a tree to control the layers of the map, we'll use an  `Ext
 
 ## Exercises
 
-* Next, we'll switch out the `Ext.panel.Panel` against a dedicated `Ext.tree.Panel`. If we look at the documentation for the [tree-panel](http://docs.sencha.com/extjs/6.0.0-classic/Ext.tree.Panel.html), you'll see a very basic example, which you should add to the viewport instead of our placeholder.
+* Next, we'll switch out the `Ext.panel.Panel` against a dedicated `Ext.tree.Panel`. If we look at the documentation for the [tree-panel](https://docs.sencha.com/extjs/6.2.0/classic/Ext.grid.Panel.html), you'll see a very basic example, which you should add to the viewport instead of our placeholder.
 
 * The example from the above page looks like this:
 

src/map-component/dissecting-example.md

@@ -162,9 +162,9 @@ Again we use `Ext.create` to build an instance of a class, this time of the `Ext
 >
 > The Viewport renders itself to the document body, and automatically sizes itself to the size of the browser viewport and manages window resizing. There may only be one Viewport created in a page.
 
-([source](http://docs.sencha.com/extjs/6.0/6.0.0-classic/#!/api/Ext.container.Viewport))
+([source](https://docs.sencha.com/extjs/6.2.0/classic/Ext.container.Viewport.html))
 
-This viewport will be as big as the browser viewport. All it's children (configured via the `items`-key) will be laid out according to the [`fit`-layout](http://docs.sencha.com/extjs/6.0/6.0.0-classic/#!/api/Ext.layout.container.Fit). This layout ensures that the child component (in our case the `mapComponent`) will be as big as the viewport itself.
+This viewport will be as big as the browser viewport. All it's children (configured via the `items`-key) will be laid out according to the [`fit`-layout](https://docs.sencha.com/extjs/6.2.0/classic/Ext.layout.container.Fit.html). This layout ensures that the child component (in our case the `mapComponent`) will be as big as the viewport itself.
 
 Try to resize your browser window and notice that the viewport (and the containing map component) always fills out the full area of the browser window.