Restore whitespace for page control buttons

Even with whitespace trim, we need a single space between the icon and text

core/ui/PageControls/language.tid

@@ -16,6 +16,7 @@ $(languagePluginTitle)$/icon
 </$set>
 </span>
 </$list>
+<$text text=" "/>
 <$list filter="[<tv-config-toolbar-text>match[yes]]">
 <span class="tc-btn-text"><$text text={{$:/language/Buttons/Language/Caption}}/></span>
 </$list>

core/ui/PageControls/palette.tid

@@ -9,6 +9,7 @@ description: {{$:/language/Buttons/Palette/Hint}}
 <$list filter="[<tv-config-toolbar-icons>match[yes]]">
 {{$:/core/images/palette}}
 </$list>
+<$text text=" "/>
 <$list filter="[<tv-config-toolbar-text>match[yes]]">
 <span class="tc-btn-text"><$text text={{$:/language/Buttons/Palette/Caption}}/></span>
 </$list>

core/ui/PageControls/storyview.tid

@@ -14,6 +14,7 @@ $:/core/images/storyview-$(storyview)$
 <$transclude tiddler=<<icon>>/>
 </$set>
 </$list>
+<$text text=" "/>
 <$list filter="[<tv-config-toolbar-text>match[yes]]">
 <span class="tc-btn-text"><$text text={{$:/language/Buttons/StoryView/Caption}}/></span>
 </$list>

core/ui/PageControls/theme.tid

@@ -9,6 +9,7 @@ description: {{$:/language/Buttons/Theme/Hint}}
 <$list filter="[<tv-config-toolbar-icons>match[yes]]">
 {{$:/core/images/theme-button}}
 </$list>
+<$text text=" "/>
 <$list filter="[<tv-config-toolbar-text>match[yes]]">
 <span class="tc-btn-text"><$text text={{$:/language/Buttons/Theme/Caption}}/></span>
 </$list>