DEV: Resolve more link-to deprecations for ember upgrade (#193)

admin/assets/javascripts/discourse/templates/admin/plugins-house-ads-index.hbs

@@ -43,7 +43,7 @@
     </form>
   {{else}}
     <p>
-      {{#link-to "adminPlugins.houseAds.show" "new"}}
+      {{#link-to route="adminPlugins.houseAds.show" model="new"}}
         {{i18n "admin.adplugin.house_ads.get_started"}}
       {{/link-to}}
     </p>

admin/assets/javascripts/discourse/templates/admin/plugins-house-ads.hbs

@@ -3,16 +3,18 @@
   {{#if model.length}}
     <div class="content-list">
       <div class="house-ads-actions">
-        {{#link-to
-          route="adminPlugins.houseAds.show" model="new" class="btn btn-primary"
-        }}
+        <LinkTo
+          @route="adminPlugins.houseAds.show"
+          @model="new"
+          class="btn btn-primary"
+        >
           {{d-icon "plus"}}
           <span>{{i18n "admin.adplugin.house_ads.new"}}</span>
-        {{/link-to}}
-        {{#link-to route="adminPlugins.houseAds.index" class="btn btn-default"}}
+        </LinkTo>
+        <LinkTo @route="adminPlugins.houseAds.index" class="btn btn-default">
           {{d-icon "cog"}}
           <span>{{i18n "admin.adplugin.house_ads.settings"}}</span>
-        {{/link-to}}
+        </LinkTo>
       </div>
       <ul class="house-ads-list">
         {{#each model as |ad|}}