i18n(settings): keep the game's own vocabulary, and stop duplicating a key

A review pass found the translation commit had introduced a split rather
than closed one.

Every existing string in this plugin leaves "tell" untranslated -- it is
what the game calls the thing, in twenty values across the German file
alone. My new keys translated it, so the channels tab showed "Auto-Tell-
Tabs" and, two rows below, "Flüstern automatisch öffnen". Thirteen of
fourteen sampled languages had the same break. The four affected keys
now use the established word, which also fixes a German line that had
tells "aufgehen" like a door.

Turkish said the opposite of what the control does: saydamlık is
transparency, the slider is opacity, and 1.0 means fully opaque. Every
other language uses the opacity word. Corrected, along with the inactive
one beside it.

Compact density had grown a second key for a field that already had one.
Appearance_UseCompactDensity_Name and _Description were sitting there
with no caller -- which is precisely what this cycle exists to fix -- so
the chat tab uses those and my duplicate is gone again. The German
wizard label for the same field said "Kompakter Density-Modus"; it says
the same thing as the other two now.

Also: Hungarian called a pop-out window "kiemelt" (highlighted), the
project's word is "kiugró"; German called it "ausgeklappt", which is
what a menu does; Italian and Polish had a clumsy inactive-opacity
label.

435 keys, all 25 files, no gaps, no orphans in either direction.

One claim in the previous commit was wrong and is worth stating plainly:
it said only log lines, thread names, developer tools and brand strings
remained English. The appearance tab is still English throughout -- the
theme picker, the colour editor, the font section, the live preview --
and so are parts of the database viewer, which is a documented user
command, not a developer tool. That is a separate block, not a footnote.

HellionChat/Resources/HellionStrings.fi.resx

@@ -1247,7 +1247,7 @@
     <value>Koon muuttaminen</value>
   </data>
   <data name="Settings_Section_TellAutoOpen" xml:space="preserve">
-    <value>Kuiskausten automaattinen avaus</value>
+    <value>Tellin automaattinen avaus</value>
   </data>
   <data name="Settings_Section_Sidebar" xml:space="preserve">
     <value>Sivupalkki</value>
@@ -1282,12 +1282,6 @@
   <data name="Settings_General_Language_Description" xml:space="preserve">
     <value>Vaihto rakentaa fonttiatlaksen uudelleen, joten chat on hetken tyhjä.</value>
   </data>
-  <data name="Settings_Chat_CompactDensity_Name" xml:space="preserve">
-    <value>Tiivis tiheys</value>
-  </data>
-  <data name="Settings_Chat_CompactDensity_Description" xml:space="preserve">
-    <value>Vaihtaa korttiasettelun yhteen riviin per viesti.</value>
-  </data>
   <data name="Settings_Chat_Clock24_Name" xml:space="preserve">
     <value>24 tunnin kello</value>
   </data>
@@ -1304,13 +1298,13 @@
     <value>Kummalla puolella komentovihjeluettelo näkyy kirjoitettaessa.</value>
   </data>
   <data name="Settings_Channels_TellAutoOpenMode_Name" xml:space="preserve">
-    <value>Automaattisen avauksen tila</value>
+    <value>Tellin automaattisen avauksen tila</value>
   </data>
   <data name="Settings_Channels_TellAutoOpenMode_Description" xml:space="preserve">
-    <value>Missä kuiskaus avautuu saapuessaan.</value>
+    <value>Missä tell avautuu saapuessaan.</value>
   </data>
   <data name="Settings_Channels_TellSwitchAlways_Name" xml:space="preserve">
-    <value>Vaihda välilehteen jokaisella kuiskauksella</value>
+    <value>Vaihda välilehteen jokaisella tellillä</value>
   </data>
   <data name="Settings_Channels_TellSwitchAlways_Description" xml:space="preserve">
     <value>Muuten välilehti avautuu taustalle ensimmäisen jälkeen.</value>