ui: fix minor spelling and consistency

Trivial issues found during Vulkan SDK testing.

"Impementation" was misspelled.

"Queue Families" had both words capitalized in one place, but one capitalized and
the other lowercase in another place.

vulkancapsviewer.ui

@@ -1382,7 +1382,7 @@ height: 24px;
          </widget>
          <widget class="QWidget" name="tab_12">
           <attribute name="title">
-           <string>Queue families</string>
+           <string>Queue Families</string>
           </attribute>
           <layout class="QVBoxLayout" name="verticalLayout_15">
            <item>
@@ -1623,7 +1623,7 @@ height: 24px;
                  </column>
                  <column>
                   <property name="text">
-                   <string>Impementation</string>
+                   <string>Implementation</string>
                   </property>
                  </column>
                  <column>