fixed start page icons

terminus-core/src/components/startPage.component.pug

 div
     .terminus-logo
     h1.terminus-title Terminus
-        sup α 
+        sup α
 
     .list-group
         a.list-group-item.list-group-item-action.d-flex(
             *ngFor='let button of getButtons()',
             (click)='button.click()',
         )
-            .d-flex.align-self-center([innerHTML]='button.icon')
+            .d-flex.align-self-center([innerHTML]='sanitizeIcon(button.icon)')
             span {{button.title}}
 
 footer.d-flex.align-items-center

terminus-core/src/components/startPage.component.ts

 import { Component, Inject } from '@angular/core'
+import { DomSanitizer } from '@angular/platform-browser'
 import { ConfigService } from '../services/config.service'
 import { HomeBaseService } from '../services/homeBase.service'
 import { ToolbarButton, ToolbarButtonProvider } from '../api'
@@ -14,6 +15,7 @@ export class StartPageComponent {
 
     constructor (
         private config: ConfigService,
+        private domSanitizer: DomSanitizer,
         public homeBase: HomeBaseService,
         @Inject(ToolbarButtonProvider) private toolbarButtonProviders: ToolbarButtonProvider[],
     ) {
@@ -26,4 +28,8 @@ export class StartPageComponent {
             .filter(x => !!x.click)
             .sort((a: ToolbarButton, b: ToolbarButton) => (a.weight || 0) - (b.weight || 0))
     }
+
+    sanitizeIcon (icon: string): any {
+        return this.domSanitizer.bypassSecurityTrustHtml(icon || '')
+    }
 }