Added English (United Kingdom) translation

Not a huge change from the default US English but also added the flag.
This was done to document the process for the wiki!

CMakeLists.txt

@@ -150,6 +150,7 @@ set(SQLB_TSS
 	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_fr.ts"
 	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_ru.ts"
 	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_pt_BR.ts"
+	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_en_GB.ts"
 )
 
 if(USE_QT5)

src/src.pro

@@ -103,7 +103,8 @@ TRANSLATIONS += \
     translations/sqlb_de.ts \
     translations/sqlb_fr.ts \
     translations/sqlb_ru.ts \
-    translations/sqlb_pt_BR.ts
+    translations/sqlb_pt_BR.ts \
+    translations/sqlb_en_GB.ts
 
 CONFIG(sqlcipher) {
 	QMAKE_CXXFLAGS += -DENABLE_SQLCIPHER

src/translations/flags/flags.qrc

@@ -6,5 +6,6 @@
         <file alias="ru_RU">ru.png</file>
         <file alias="zh_CN">cn.png</file>
         <file alias="pt_BR">br.png</file>
+        <file alias="en_GB">gb.png</file>
     </qresource>
 </RCC>

src/translations/translations.qrc

@@ -5,5 +5,6 @@
         <file alias="sqlb_fr">sqlb_fr.qm</file>
         <file alias="sqlb_zh">sqlb_zh.qm</file>
         <file alias="sqlb_pt_BR">sqlb_pt_BR.qm</file>
+        <file alias="sqlb_en_GB">sqlb_en_GB.qm</file>
     </qresource>
 </RCC>