fixes for directory page

[niryariv]

• [x] show all items together under the categories, both offer/request and commerce (eg in the page below, "Tent" and "Megaphone" should appear in the categories not the right side view
• [x] separate the right side ("my content") from the categories with a gray (#ddd) line
• [x] make the left side ("categories") 3 columns wide
• [x] make sure we see english only (or hebrew only in the hebrew site)

[shlomilahav]