[editor] Restructure and rename canvas components

projects/editor/src/app/app.component.ts

projects/editor/src/app/app.module.ts

...ts/properties-panel/element-properties-panel.component.ts

...ts/unit-view/element-overlay/dynamic-overlay.component.ts

...ts/unit-view/element-overlay/element-overlay.directive.ts

...nts/unit-view/element-overlay/static-overlay.component.ts

...rc/app/components/unit-view/page/page-menu.component.html

.../src/app/components/unit-view/page/page-menu.component.ts

...rc/app/components/unit-view/page/page-view.component.html

.../src/app/components/unit-view/page/page-view.component.ts

...components/unit-view/section/dynamic-section.component.ts

...pp/components/unit-view/section/section-menu.component.ts

...src/app/components/unit-view/section/section.component.ts

.../components/unit-view/section/static-section.component.ts

...tor/src/app/components/unit-view/unit-view.component.html

...ditor/src/app/components/unit-view/unit-view.component.ts

projects/editor/src/app/services/selection.service.ts