Debugger: Add 'command[s]' to breakpoints, polish BP dialogs.

Add commands (CDB, gdb with '\n' delimiter for multiple),
rearrange dialogs, make ignore count a spin box.

src/plugins/debugger/cdb/cdbparsehelpers.cpp

@@ -106,6 +106,8 @@ QByteArray cdbAddBreakpointCommand(const BreakpointParameters &bpIn,
     if (bp.ignoreCount)
         str << ' ' << (bp.ignoreCount + 1);
     // Condition currently unsupported.
+    if (!bp.command.isEmpty())
+        str << " \"" << bp.command << '"';
     return rc;
 }