Unload Tab from context menu to free up system resources.

Right click menu on tab will have an option to 'Unload Tab'. This will be disabled for tabs which are already unloaded. Pages 'about:*' will not have the context menu shown as they can't be unloaded.

• Reload options on change.
• Support for multiple tabs selected.

• Added option to add to page context menu.

• Menu item will disable if the tab is already unloaded.
• Menu item will not be displayed for 'about:*' pages as they don't unload.
• Added an options page.
  • Added option new-tab-placement. Determines where to create new tab if all tabs in window are unloaded.
• Storage of options.

Fixed unloading last tab. When last tab or only tab gets unloaded a newtab page opens.

Context menu on tab has option to unload the current tab. Switches to next loaded tab or creates a new tab.