Add "none" as an option in the icon dropdown in tag manager (#4361)

* add no-icon option to tagmanager and add ...

... whitespace trims

* Update Misc.multids

core/language/en-GB/Misc.multids

@@ -66,6 +66,7 @@ SystemTiddlers/Include/Prompt: Include system tiddlers
 TagManager/Colour/Heading: Colour
 TagManager/Count/Heading: Count
 TagManager/Icon/Heading: Icon
+TagManager/Icons/None: None
 TagManager/Info/Heading: Info
 TagManager/Tag/Heading: Tag
 Tiddler/DateFormat: DDth MMM YYYY at hh12:0mmam

core/ui/TagManager.tid

@@ -4,6 +4,8 @@ color: #bbb
 
 \define lingo-base() $:/language/TagManager/
 \define iconEditorTab(type)
+\whitespace trim
+<$link to=""><<lingo Icons/None>></$link>
 <$list filter="[all[shadows+tiddlers]is[image]] [all[shadows+tiddlers]tag[$:/tags/Image]] -[type[application/pdf]] +[sort[title]] +[$type$is[system]]">
 <$link to={{!!title}}>
 <$transclude/> <$view field="title"/>
@@ -11,6 +13,7 @@ color: #bbb
 </$list>
 \end
 \define iconEditor(title)
+\whitespace trim
 <div class="tc-drop-down-wrapper">
 <$button popupTitle={{{ [[$:/state/popup/icon/]addsuffix<__title__>] }}} class="tc-btn-invisible tc-btn-dropdown">{{$:/core/images/down-arrow}}</$button>
 <$reveal stateTitle={{{ [[$:/state/popup/icon/]addsuffix<__title__>] }}} type="popup" position="belowleft" text="" default="">
@@ -25,6 +28,7 @@ color: #bbb
 </div>
 \end
 \define toggleButton(state)
+\whitespace trim
 <$reveal stateTitle=<<__state__>> type="match" text="closed" default="closed">
 <$button setTitle=<<__state__>> setTo="open" class="tc-btn-invisible tc-btn-dropdown" selectedClass="tc-selected">
 {{$:/core/images/info-button}}
@@ -36,6 +40,7 @@ color: #bbb
 </$button>
 </$reveal>
 \end
+\whitespace trim
 <table class="tc-tag-manager-table">
 <tbody>
 <tr>