fix bind instructions for Windows Alt-*-KeyPress combinations, doc updates for fill attributes in shapes.

Changelog

@@ -1,4 +1,14 @@
 2.9.8
+- enable "bus=true" attribute for lines as well as for wires.
+  As a side effect LCC schematics with bussed wires will display thick buses
+- added command <Alt-b> (menu Symbol->Show only instance Bounding boxes) to toggle
+  displaying instance detals / only bounding box.
+- added "dash=n" (n=integer) attribute for lines, polygons, rectangles, arcs to set dashed line style.
+  n is the dash length in pixels.
+- verilog_ignore, spice_ignore, vhdl_ignore attributes on schematic pins are propagated to symbol pin attributes
+  (if using make symbol from schematic, otherwise propagate by hand). 
+  These pins are not netlisted in the respective netlist format
+- -b option to detach xschem from terminal
 - NO_CAIRO builds also use 'layer=' attribute to display text on custom layers.
 - pdf and svg exports follow the enable_layer[] array to display/hide layers as does draw() 
 - LCC function (Local Custom Cell):

doc/xschem_man/xschem_elements.html

@@ -56,13 +56,15 @@ p{padding: 15px  30px 10px;}
   <h3> POLYGONS </h3>
   <p>
    Polygons are paths that can be drawn on any layer. Placements begins with the <kbd>'ctrl-w'</kbd> key
-   and continues as long as the user clicks points on the drawing area. Placement ends when:
+   and continues as long as the user clicks points on the drawing area. Placement ends when:</p>
    <ul>
    <li> the last point is coincident to the first point.</li>
    <li>  or by clicking the <kbd>right mouse button</kbd>,  for an open polygon. </li>
    <li>  or by hitting the <kbd>Return</kbd> key, for a closed polygon
          (this can be done also by clicking the last point coincident to the first polygon point).</li>
    </ul>
+  <p>
+  A <kbd>fill=true</kbd> attribute may be given to have the shape filled with the layer fill style.
   </p>
   <img src="xschem_polygons.png">
   <h3> CIRCLES / ARCS </h3>
@@ -77,6 +79,7 @@ p{padding: 15px  30px 10px;}
    - (start point selected in stretch mode):by starting a move (<kbd>m</kbd>) operation and moving the mouse the start arc angle may be changed.<br>
    - (arch center selected in stretch mode): by starting a move (<kbd>m</kbd>) operation and moving the mouse the arc radius may be changed.<br>
    If a circle is needed then use the <kbd>Ctrl-Shift-C</kbd> key combination.
+   <br>A <kbd>fill=true</kbd> attribute may be given to have the shape filled with the layer fill style.
   </p>
   <img src="xschem_elements_01.png">
 

src/xschem.tcl

@@ -2929,8 +2929,8 @@ proc build_windows {} {
     # on Windows Alt key mask is reported as 131072 (1<<17) so build masks manually with values passed from C code 
     if {$::OS == "Windows" } {
       bind .drw <Alt-KeyPress> {xschem callback %T %x %y %N 0 0 [expr $Mod1Mask]}
-      bind .drw <Control-Alt-KeyPress> {xschem callback %T %x %y %N 0 0 [expr $ShiftMask + $Mod1Mask]}
-      bind .drw <Shift-Alt-KeyPress> {xschem callback %T %x %y %N 0 0 9 [expr $ControlMask + $Mod1Mask]}
+      bind .drw <Control-Alt-KeyPress> {xschem callback %T %x %y %N 0 0 [expr $ControlMask + $Mod1Mask]}
+      bind .drw <Shift-Alt-KeyPress> {xschem callback %T %x %y %N 0 0 [expr $ShiftMask + $Mod1Mask]}
     }
 
     bind .drw <KeyPress> {xschem callback %T %x %y %N 0 0 %s}
@@ -2950,6 +2950,8 @@ proc build_windows {} {
 ###   MAIN PROGRAM
 ###
 
+namespace import -force ttk::*
+
 set OS [lindex $tcl_platform(os) 0]
 
 # tcl variable XSCHEM_LIBRARY_PATH  should already be set in xschemrc