Reword text in water preset

[naoliv]

To avoid any doubts if we are actually setting intermittent=yes or seasonal=yes (​https://wiki.openstreetmap.org/wiki/Key:seasonal)

data/defaultpresets.xml

@@ -2479 +2479 @@
             <text key="name" text="Name" />
             <combo key="water" text="Water Body" values="canal,lake,lagoon,oxbow,pond,reservoir,river,lock,wastewater" match="key" values_searchable="true" />
             <check key="salt" text="Salt Water" disable_off="true" />
-            <check key="intermittent" text="Is the water body intermittent (disappears seasonally)?" disable_off="true" />
+            <check key="intermittent" text="Is the water body intermittent (disappears occasionally)?" disable_off="true" />
             <check key="tidal" text="In the tidal range" disable_off="true" />
             <text key="wikipedia" text="Wikipedia" />
             <reference ref="water_access" />
@@ -2512 +2512 @@
             <space />
             <key key="waterway" value="riverbank" />
             <text key="name" text="Name" />
-            <check key="intermittent" text="Is the water body intermittent (disappears seasonally)?" disable_off="true" />
+            <check key="intermittent" text="Is the water body intermittent (disappears occasionally)?" disable_off="true" />
             <check key="tidal" text="In the tidal range" disable_off="true" />
         </item> <!-- Riverbank -->
         <separator/>

[Klumbumbus]

In 14117/josm:

• ignore building=slurry_tank, only used in germany/denmark; building=storage_tank and/or man_made=storage=tank with content=slurry seems to be better
• fix #16584 - reword explanation of intermittent according wiki