Update de, fr, es, it

Author: juzzlin

src/translations/heimer_de.ts

@@ -641,7 +641,7 @@
     <message>
         <location filename="../tool_bar.cpp" line="132"/>
         <source>Arrow size:</source>
-        <translation type="unfinished"></translation>
+        <translation>Pfeilgröße:</translation>
     </message>
     <message>
         <location filename="../tool_bar.cpp" line="149"/>

src/translations/heimer_es.ts

@@ -645,7 +645,7 @@
     <message>
         <location filename="../tool_bar.cpp" line="132"/>
         <source>Arrow size:</source>
-        <translation type="unfinished"></translation>
+        <translation type="unfinished">Tamaño de la flecha:</translation>
     </message>
     <message>
         <location filename="../tool_bar.cpp" line="149"/>

src/translations/heimer_fr.ts

@@ -732,7 +732,7 @@
     <message>
         <location filename="../tool_bar.cpp" line="132"/>
         <source>Arrow size:</source>
-        <translation type="unfinished"></translation>
+        <translation type="unfinished">Taille de la flèche:</translation>
     </message>
     <message>
         <location filename="../tool_bar.cpp" line="149"/>

src/translations/heimer_it.ts

@@ -716,7 +716,7 @@
     <message>
         <location filename="../tool_bar.cpp" line="132"/>
         <source>Arrow size:</source>
-        <translation type="unfinished"></translation>
+        <translation type="unfinished">Dimensione della freccia:</translation>
     </message>
     <message>
         <location filename="../tool_bar.cpp" line="149"/>