Rename unclear getSegments and getPages selectors

[MAILPOET-2450]

assets/js/src/form_editor/components/form_settings/basic_settings_panel.jsx

@@ -17,12 +17,12 @@ export default () => {
     []
   );
   const segments = useSelect(
-    (select) => select('mailpoet-form-editor').getSegments(),
+    (select) => select('mailpoet-form-editor').getAllAvailableSegments(),
     []
   );
 
   const pages = useSelect(
-    (select) => select('mailpoet-form-editor').getPages(),
+    (select) => select('mailpoet-form-editor').getAllAvailablePages(),
     []
   );
 

assets/js/src/form_editor/store/selectors.jsx

@@ -17,10 +17,10 @@ export default {
   getFormSettings(state) {
     return state.formData.settings;
   },
-  getSegments(state) {
+  getAllAvailableSegments(state) {
     return state.segments;
   },
-  getPages(state) {
+  getAllAvailablePages(state) {
     return state.pages;
   },
   getIsFormSaving(state) {