To much useless HEK event information is downloaded

Instead of downloading all available event fields, make a useful preselection of fields that might be interesting.

In order to fix this "Bug", the following steps need to be done:

1) Make a good selection
2) Map this selection to some "editable" piece of code (make it configurable?)
3) Only download these pieces of information
4) Extend HEKEvents in such a way, that they can be marked as "not fully downloaded" / "preview-event" and use it
5) Add a "download all" button to the HEKEventInformationWindow and other places

Here is some data of a standard Active Region that is currently downloaded in this form for each event.

SOL_standard : SOL2010-08-01T00:00:00L078C077
active : true
ar_compactnesscls :
ar_mcintoshcls : HKX
ar_mtwilsoncls : ALPHA
ar_noaaclass :
ar_noaanum : 11092
ar_numspots : 2
ar_penumbracls :
ar_polarity : null
ar_spotarearaw : null
ar_spotarearawuncert : null
ar_spotarearawunit :
ar_spotarearepr : null
ar_spotarearepruncert : null
ar_spotareareprunit :
ar_zurichcls :
area_atdiskcenter : 700045390000
area_atdiskcenteruncert : null
area_raw : null
area_uncert : null
area_unit : km2
bound_ccnsteps : null
bound_ccstartc1 : null
bound_ccstartc2 : null
bound_chaincode :
boundbox_c1ll : -36.5
boundbox_c1ur : -33.5
boundbox_c2ll : 5.9702
boundbox_c2ur : 20.0298
chaincodetype :
concept : Active Region
event_c1error : 1.5
event_c2error : 7.02981
event_clippedspatial :
event_clippedtemporal :
event_coord1 : -35
event_coord2 : 13
event_coord3 : null
event_coordsys : UTC-HGS-TOPO
event_coordunit : deg deg
event_description :
event_endtime : 2010-08-01T23:59:59
event_expires :
event_importance :
event_importance_num_ratings :
event_mapurl :
event_maskurl :
event_npixels : null
event_pixelunit :
event_probability : 1
event_starttime : 2010-08-01T00:00:00
event_testflag : false
event_title :
event_type : AR
eventtype : 1
frm_contact : http://www.sec.noaa.gov/
frm_daterun : 2010-08-02T16:32:32
frm_humanflag : true
frm_identifier : NOAA SEC
frm_institute : NOAA Space Environment Center
frm_name : NOAA SEC Observer
frm_paramset : N/A
frm_url : N/A
frm_versionnumber : null
gs_galleryid :
gs_imageurl :
gs_movieurl :
gs_thumburl :
hgc_bbox : POLYGON((77.44808 5.9702,80.44 ...
hgc_boundcc :
hgc_coord : POINT(78.94808 13)
hgc_x : 78.94808
hgc_y : 13
hgs_bbox : POLYGON((-36.5 5.9702,-33.5 5. ...
hgs_boundcc :
hgs_coord : POINT(-35 13)
hgs_x : -35
hgs_y : 13
hpc_bbox : POLYGON((-561.0072 21.97302,-5 ...
hpc_boundcc :
hpc_coord : POINT(-530.0046 136.2138)
hpc_x : -530.0046
hpc_y : 136.2138
hrc_a : 75.5866391343197
hrc_bbox : POLYGON((0.594246 87.757037,0. ...
hrc_boundcc :
hrc_coord : POINT(0.579207287054896 75.586 ...
hrc_r : 0.579207287054896
kb_archivdate : 2010-08-02T16:32:36
kb_archivid : ivo://helio-informatics.org/AR ...
kb_archivist : cheung_mark
obs_channelid : visible
obs_dataprepurl :
obs_instrument : various
obs_meanwavel : 5.0E-5
obs_observatory : various
obs_title :
obs_wavelunit : cm
rasterscan :
rasterscantype :
refs : [{"ref_url":"N/A","ref_type":" ...
refs_orig :
revision : 1