Validator produces wrong warning for misspelled tag key

[GerdP]

What steps will reproduce the problem?

1. Create closed way with tag land_Area=administrative
2. Run Validator

What is the expected result?

Warning "Key 'land_Area' looks like 'land_Area'"

What happens instead?

Warning "Presets do not contain property key - Key 'land_Area' not in presets."

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

See also #17444.
The comment in file ignoreTags.cfg says

; K:  the given tag will not produce a "tag not in presets" error, but it is 
;     used as dictionary entry for spell checking the given key.

and ignoreTags.cfg contains

K:land_area=administrative

The current code uses this entry only to spell check the tag value.
The entries starting with E: chould also be used to spell check keys.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-03-03 00:16:03 +0100 (Sun, 03 Mar 2019)
Build-Date:2019-03-02 23:16:53
Revision:14824
Relative:URL: ^/trunk

Identification: JOSM/1.5 (14824 en) Windows 10 64-Bit
OS Build number: Windows 10 Home 1803 (17134)
Memory Usage: 686 MB / 1820 MB (508 MB allocated, but free)
Java version: 1.8.0_201-b09, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080
VM arguments: [-XX:StartFlightRecording=name=MyRecording2,settings=d:\dbg\gerd.jfc, -XX:FlightRecorderOptions=defaultrecording=true,dumponexit=true,dumponexitpath=e:\ld\perf_20190316_092115.jfr]
Dataset consistency test: No problems found

Plugins:
+ OpeningHoursEditor (34867)
+ apache-commons (34506)
+ buildings_tools (34904)
+ continuosDownload (82)
+ download_along (34869)
+ ejml (34389)
+ geotools (34513)
+ jaxb (34678)
+ jts (34524)
+ o5m (34867)
+ opendata (34911)
+ pbf (34867)
+ poly (34867)
+ reltoolbox (34867)
+ reverter (34917)
+ undelete (34919)
+ utilsplugin2 (34915)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.

[GerdP]

fix typo in words.cfg ignoreFiles.cfg -> ignoreTags.cfg

[GerdP]

@Klumbumbus: Please review the changes to words.cfg and ignoreTags.cfg. Besides the changes proposed in #17444 I modified the comments and adedd an entry for barrier.
If I hear no complains I'll commit v2 on Monday.

[GerdP]

In 14897/josm:

fix #17468: Validator produces wrong warning for misspelled tag key

TODO: further improve words.cfg