Accessibility: Label links on various check boxes and radio buttons

Wrapped the ``Custom'' radio button in the Chart Workshop and Trend Analysis pages in a <label> tag with its label. This allows clicking the label as well as the button and assists non-visual browsers in identifying the control.

Added <label> tags to the radio buttons in the Export Log Database form.

Added <label> wrappers to the administrator object dump checkboxes at the bottom of the Monthly Log form.