WebUI: Show connection status in the statusbar
WebUI: Align elements in footer
WebUI: Assign min width to speed limit labels

Try to prevent continuous changes in the width of the labels.
WebUI: Use case insensitive parameters for POST requests
WebUI: Check that all and only the needed parameters are provided

Issue #1560.
WebUI: Check URI of GET and POST requests
WebUI: Prevent default action of links

This prevents anchors from being added to the URL.
WebUI: MochaUI: Use same cursors on Gecko and WebKit