Keyboard input gets ignored and menu items are greyed out after closing certain dialog boxes

[chris@…]

What steps will reproduce the problem?

1. Open the F3 preset box or the download area map
2. Select something and accept the results
3. Use a keyboard shortcut or look through the menus

What is the expected result?

Keyboard works normally and the full menus are available

What happens instead?

All keyboard shortcuts and menu items are greyed out

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

It seems like Java doesn't recognize that the dialogue box has closed until another box is opened and then closed. The way I usually continue after hitting this error is to use my mouse to select an object, click the add tag button, then hit escape to cancel that dialogue, then full menu and keyboard shortcuts work again (though this does not work around the #15787 delete & undo bug I filed)

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-12-31 03:09:43 +0100 (Sun, 31 Dec 2017)
Build-Date:2017-12-31 02:33:46
Revision:13265
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13265 en) Mac OS X 10.11.6
OS Build number: Mac OS X 10.11.6 (15G18013)
Memory Usage: 640 MB / 1820 MB (219 MB allocated, but free)
Java version: 1.8.0_151-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: Display 2026427093 1920x1080
Maximum Screen Size: 1920x1080
VM arguments: [-Djava.security.policy=file:<java.home>/lib/security/javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>/bin, -Djava.security.manager, -Djnlpx.origFilenameArg=${HOME}/Library/Application Support/Oracle/Java/Deployment/cache/6.0/56/1ee8cfb8-668392a0, -Djnlpx.remove=false, -Dsun.awt.warmup=true, -Djava.util.Arrays.useLegacyMergeSort=true, -Dmacosx.jnlpx.dock.name=JOSM, -Dmacosx.jnlpx.dock.icon=${HOME}/Library/Application Support/Oracle/Java/Deployment/cache/6.0/16/47ee53d0-5050928a.icns, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp , -Djnlpx.jvm="<java.home>/bin/java"]
Dataset consistency test: No problems found

Last errors/warnings:
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.net.UnknownHostException: ecn.t1.tiles.virtualearth.net
- W: java.net.UnknownHostException: ecn.t1.tiles.virtualearth.net
- W: java.net.UnknownHostException: ecn.t1.tiles.virtualearth.net
- W: java.net.UnknownHostException: ecn.t1.tiles.virtualearth.net
- W: java.net.ConnectException: Network is down (connect failed)
- E: java.net.ConnectException: Network is down (connect failed)
- W: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: java.net.ConnectException: Network is down (connect failed)