Revert "Move bulkselector.js contents to existing racktables.js"

This commit makes the JQueryUI-specific code to execute on every page
which leads to JS error and brakes further JS execution.

This reverts commit f1f5e991634572a5ce4b0d1d8f57c8c659d27058.
portinfo pop-up menu fixes

- Do now show 'Show all info' menu item if none of the portinfo options
available
- By clicking on 'Show all info', disable only portinfo-related items