center network view button in sidebar

...app/components/analysis-panel/analysis-panel.component.ts

src/app/components/info-tile/info-tile.component.html

...etwork/network-menu-left/network-menu-left.component.html

...mponents/network/network-menu/network-menu.component.html

src/app/components/network/network.component.ts

...dd-expressed-proteins/add-expressed-proteins.component.ts

src/app/dialogs/launch-analysis/launch-analysis.component.ts

src/app/interfaces.ts

src/app/pages/explorer-page/explorer-page.component.ts

...app/services/netex-controller/netex-controller.service.ts