#38 fix: design of instance page

webui/src/App/App.module.scss

webui/src/App/Header/Header.module.scss

webui/src/App/Header/Header.tsx

webui/src/App/SideMenu/SideMenu.module.scss

webui/src/App/SideMenu/SideMenu.tsx

webui/src/assets/logo.svg

...dules/nodes/nodesPage/ClusterInfo/ClusterInfo.module.scss

...i/src/modules/nodes/nodesPage/ClusterInfo/ClusterInfo.tsx

...src/modules/nodes/nodesPage/NodesContent/NodesContent.tsx

...ent/ReplicasetCard/instanceBlock/InstanceCard.module.scss

...odesContent/ReplicasetCard/instanceBlock/InstanceCard.tsx

...t/TopBar/FilterBy/FilterByModal/FilterByModal.module.scss

...esContent/TopBar/FilterBy/FilterByModal/FilterByModal.tsx

...es/nodes/nodesPage/NodesContent/TopBar/TopBar.module.scss

webui/src/modules/nodes/nodesPage/NodesPage.module.scss

webui/src/shared/components/Prompt/Prompt.module.scss

webui/src/shared/components/Prompt/PromptIcon.tsx

...ared/components/buttons/FilterByButton/FilterByButton.tsx

...shared/components/buttons/GroupByButton/GroupByButton.tsx

...c/shared/components/buttons/SortByButton/SortByButton.tsx