qt: Final translation update before 0.12 fork

- Add new translations (finally, after a long time)
- update-translation script was not considering new translations - oops
  - fixed this, also remove (nearly) empty translations
- Update translation process, it was still describing the old repository
  structure

src/qt/locale/bitcoin_et.ts

@@ -1743,14 +1743,6 @@
         <source>Send trace/debug info to console instead of debug.log file</source>
         <translation>Saada jälitus/debug, debug.log faili asemel, konsooli</translation>
     </message>
-    <message>
-        <source>Set language, for example "de_DE" (default: system locale)</source>
-        <translation>Keele valik, nt "ee_ET" (vaikeväärtus: system locale)</translation>
-    </message>
-    <message>
-        <source>Show splash screen on startup (default: 1)</source>
-        <translation>Käivitamisel teabeakna kuvamine (vaikeväärtus: 1)</translation>
-    </message>
     <message>
         <source>Shrink debug.log file on client startup (default: 1 when no -debug)</source>
         <translation>Kahanda programmi käivitamisel debug.log faili (vaikeväärtus: 1, kui ei ole -debug)</translation>
@@ -1759,10 +1751,6 @@
         <source>Signing transaction failed</source>
         <translation>Tehingu allkirjastamine ebaõnnestus</translation>
     </message>
-    <message>
-        <source>Start minimized</source>
-        <translation>Käivitu tegumiribale</translation>
-    </message>
     <message>
         <source>The transaction amount is too small to pay the fee</source>
         <translation>Tehingu summa on tasu maksmiseks liiga väikene</translation>
@@ -1775,10 +1763,6 @@
         <source>Transaction too large</source>
         <translation>Tehing liiga suur</translation>
     </message>
-    <message>
-        <source>UI Options:</source>
-        <translation>UI Valikud:</translation>
-    </message>
     <message>
         <source>Username for JSON-RPC connections</source>
         <translation>JSON-RPC ühenduste kasutajatunnus</translation>