refactor: Update splitViews module and split-views configuration

@types/split-views.d.ts

@@ -2,7 +2,7 @@
 declare type SplitType = 'horizontal' | 'vertical' | 'grid';
 
 declare interface SplitViewConfig extends Config {
-  keyIndicator: string; // e.g. "split-tab='true'"
+  splitIndicator: string; // e.g. "split-tab='true'"
   defaultSplitView: SplitType;
 };
 

README.md

@@ -7,7 +7,7 @@ Some components used by @zen-browser and @Floorp-Projects as an attempt to make
 import("chrome://../browser-splitView.mjs").then(
   ({ SplitViews }) => {
     window.gSplitView = new SplitViews({
-      keyIndicator: "zen-splitted",
+      splitIndicator: "zen-splitted",
       browserName: "zen",
       defaultSplitView: "grid",
     });

src/browser-splitViews.mjs

@@ -13,6 +13,8 @@ class SplitViewsBase {
     this.data = [];
     this.currentView = -1;
     this.addEventListeners();
+    // Added to "navigator-toolbox" element
+    this.parentSplitIndicator = this.config.splitIndicator + '-view';
     this.log('SplitViewsBase initialized');
   }