This also makes the dialog modeless so that one switch between
sheets while annotating to choose the base numbers for each
sheet (assuming they don't like the base number we pick because
of the order of the sheets).
Fixes: lp:1154131
* https://bugs.launchpad.net/kicad/+bug/1154131
Also fixes:
- forcing the annotation scope to "full schematic" when run
as a prerequisite to Generate Netlist.
- a long-standing bug where displaying extra items in a dialog
would mess up the height of the HTML_REPORT_PANEL (becasue
we were setting the html window's height rather than its
parent flexgrid.
- initializing the annotation radio buttons to safe values
(full schematic and keep existing)
Fixes: lp:1750062
* https://bugs.launchpad.net/kicad/+bug/1750062
Jeff Young
jean-pierre charras