UI Adjustments

• Updated the tab elements to be proper web components, and made them more flexible. The Main category tabs now run vertically down the left side of the UI, with sub tabs stacking horizontally above the tab's content, which is more similar to how it was before, though this configuration only applies to the sub-tabs instead of all tabs.
• Material inventory lists now hide materials for which you have no stock. Category headers for empty categories are still present, so it can look a little odd when you don't have any materials from an entire category, but will work on making this a but more elegant. For now, I just wanted to cut down on less helpful info, and what materials you don't have tends to be less useful when trying to figure out what things you want to sell, and similar activities.
• Material inventory lists now contain a count of known uses for that particular material, and clicking he material name now opens a drop down listing all known uses. note: some of the newer mods and upgrade recipes may still be slightly off, so this data may not be 100% accurate just yet