Lots of monster stuff, particularly documenting monster abilities

- Monster radiate abilities can now specify a spell pattern to use
- Fix some abilities being incorrectly shown in the editor's ability details dialog (for example, radiate abilities were shown as "Summon aid")
- Add the recently-added monster missile types to the options offered in the editor
- Fix chance of activating not being editable for the martyr's shield ability
- Show the monster summoned for summoning abilities (finally!)
- Show the subcategory for unusual abilities (one of active, passive death)
- Fix the displayed percentage chance for summon abilities (the permille was shown instead)
- Fix incorrect action point display in the editor for the two recently-added monster missiles
- Fix crash when editing a missile ability
- Fix abilities page not showing the newly-added or recently-edited ability after exiting the detail/option dialog
- Fix pick monster button for summoning abilities being off by one

doc/editor/appendix/Items.html

@@ -11,7 +11,7 @@
 </div>
 <div class="content">
 
-<h1>Appendix 2 - Item Ability Types</h1>
+<h1>Appendix 3 - Item Ability Types</h1>
 
 <p>Each item type can have a special ability. The types of abilities available range from
 shooting fireballs to weapons doing special damage to dragons to items being ingredients