Merge branch 'theme-fixes_contribute-7.6'

Author: alexandrevryghem

src/app/shared/theme-support/themed.component.ts

@@ -99,6 +99,9 @@ export abstract class ThemedComponent<T extends object> implements AfterViewInit
   }
 
   initComponentInstance(changes?: SimpleChanges) {
+    if (hasValue(this.themeSub)) {
+      this.themeSub.unsubscribe();
+    }
     this.themeSub = this.themeService?.getThemeName$().subscribe(() => {
       this.renderComponentInstance(changes);
     });