[Patch] Presets cut off on small screens

[rhn_mk1]

I'm posting this as a new bug, even if it's very similar to https://josm.openstreetmap.de/ticket/10392

The preset items don't have an option to scroll, making the last items of longer lists unuseable.

First screenshor comes from the preset list Verkehrszeichen-vorlage.xml
It ends on "maxaxleload" preset, completely cutting off the rest.

The other screenshot uses GTK+ style and it cuts off the "Quarry" element from display, without the ability to scroll down to it.

What steps will reproduce the problem?

1. Reduce screen vertical size to 768px
2. Install Verkehrszeichen presets
3. Try to click anything below "maxaxleload"

What is the expected result?

The list is clickable to scroll down and reveal additional items.

What happens instead?

When mouse is scrolled, the list closes. Items are cut off.

Please provide any additional information below. Attach a screenshot if possible.

Revision: 8677
Repository Root: http://josm.openstreetmap.de/svn
Relative URL: ^/trunk
Last Changed Author: Don-vip
Last Changed Date: 2015-08-21 22:18:03 +0200 (Fri, 21 Aug 2015)
Build-Date: 2015-08-21 23:32:08
URL: http://josm.openstreetmap.de/svn/trunk
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Rev: 8677

Identification: JOSM/1.5 (8677 en) Linux Fedora 21 (Twenty One)
Memory Usage: 291 MB / 2631 MB (232 MB allocated, but free)
Java version: 1.8.0_51, Oracle Corporation, OpenJDK 64-Bit Server VM

[rhn_mk1]

Metal theme and Verkehrszeichen presets

[rhn_mk1]

GTK+ theme and Man made preset

[simon04]

attachment:11859.patch​ adds a menu scroller for long preset groups (i.e., having 15 elements, can be changed in advanced preferences).

[simon04]

Postpone.

[simon04]

In 8982/josm:

fix #11859 - Presets cut off on small screens

Add a menu scroller for long preset groups, i.e., having 15 or more elements,
can be changed with preference key taggingpreset.min-elements-for-scroller.