homogenize translation strings

Author: jef-n

src/ui/qgisapp.ui

@@ -1356,7 +1356,7 @@
   </action>
   <action name="mActionLayerSubsetString">
    <property name="text">
-    <string>Query...</string>
+    <string>Filter...</string>
    </property>
    <property name="shortcut">
     <string>Ctrl+F</string>

src/ui/qgsbrowserdockwidgetbase.ui

@@ -220,7 +220,10 @@
      <normaloff>:/images/themes/default/mActionFilter2.svg</normaloff>:/images/themes/default/mActionFilter2.svg</iconset>
    </property>
    <property name="text">
-    <string>Filter browser</string>
+    <string>Filter Browser</string>
+   </property>
+   <property name="iconText">
+    <string>Filter Browser</string>
    </property>
    <property name="toolTip">
     <string>Filter Browser</string>

src/ui/qgsvectorlayerpropertiesbase.ui

@@ -501,7 +501,7 @@
                   </sizepolicy>
                  </property>
                  <property name="title">
-                  <string>Feature subset</string>
+                  <string>Provider feature filter</string>
                  </property>
                  <layout class="QGridLayout" name="gridLayout_4">
                   <item row="1" column="1">