FIX: if search yields no results don't hide search box

This made it very hard to recover from a search yielding no results.

.rubocop-https---raw-githubusercontent-com-discourse-discourse-master--rubocop-yml

@@ -0,0 +1,127 @@
+AllCops:
+  TargetRubyVersion: 2.4
+  DisabledByDefault: true
+  Exclude:
+    - 'db/schema.rb'
+    - 'bundle/**/*'
+    - 'vendor/**/*'
+    - 'node_modules/**/*'
+    - 'public/**/*'
+    - 'plugins/**/gems/**/*'
+
+# Prefer &&/|| over and/or.
+Style/AndOr:
+  Enabled: true
+
+Style/FrozenStringLiteralComment:
+  Enabled: true
+
+# Do not use braces for hash literals when they are the last argument of a
+# method call.
+Style/BracesAroundHashParameters:
+  Enabled: true
+
+# Align `when` with `case`.
+Layout/CaseIndentation:
+  Enabled: true
+
+# Align comments with method definitions.
+Layout/CommentIndentation:
+  Enabled: true
+
+# No extra empty lines.
+Layout/EmptyLines:
+  Enabled: true
+
+# Use Ruby >= 1.9 syntax for hashes. Prefer { a: :b } over { :a => :b }.
+Style/HashSyntax:
+  Enabled: true
+
+# Two spaces, no tabs (for indentation).
+Layout/IndentationWidth:
+  Enabled: true
+
+Layout/SpaceAfterColon:
+  Enabled: true
+
+Layout/SpaceAfterComma:
+  Enabled: true
+
+Layout/SpaceAroundEqualsInParameterDefault:
+  Enabled: true
+
+Layout/SpaceAroundKeyword:
+  Enabled: true
+
+Layout/SpaceAroundOperators:
+  Enabled: true
+
+Layout/SpaceBeforeFirstArg:
+    Enabled: true
+
+# Defining a method with parameters needs parentheses.
+Style/MethodDefParentheses:
+  Enabled: true
+
+# Use `foo {}` not `foo{}`.
+Layout/SpaceBeforeBlockBraces:
+  Enabled: true
+
+# Use `foo { bar }` not `foo {bar}`.
+Layout/SpaceInsideBlockBraces:
+  Enabled: true
+
+# Use `{ a: 1 }` not `{a:1}`.
+Layout/SpaceInsideHashLiteralBraces:
+  Enabled: true
+
+Layout/SpaceInsideParens:
+  Enabled: true
+
+# Detect hard tabs, no hard tabs.
+Layout/Tab:
+  Enabled: true
+
+# Blank lines should not have any spaces.
+Layout/TrailingBlankLines:
+  Enabled: true
+
+# No trailing whitespace.
+Layout/TrailingWhitespace:
+  Enabled: true
+
+Lint/Debugger:
+  Enabled: true
+
+Layout/BlockAlignment:
+  Enabled: true
+
+# Align `end` with the matching keyword or starting expression except for
+# assignments, where it should be aligned with the LHS.
+Layout/EndAlignment:
+  Enabled: true
+  EnforcedStyleAlignWith: variable
+
+# Use my_method(my_arg) not my_method( my_arg ) or my_method my_arg.
+Lint/RequireParentheses:
+  Enabled: true
+
+Lint/ShadowingOuterLocalVariable:
+  Enabled: true
+
+Layout/MultilineMethodCallIndentation:
+  Enabled: true
+  EnforcedStyle: indented
+
+Layout/AlignHash:
+  Enabled: true
+
+Bundler/OrderedGems:
+  Enabled: false
+
+Style/SingleLineMethods:
+  Enabled: true
+
+Style/Semicolon:
+  Enabled: true
+  AllowAsExpressionSeparator: true

assets/javascripts/discourse/templates/knowledge-explorer.hbs

@@ -1,11 +1,11 @@
 <div class="knowledge-explorer">
+  {{knowledge-explorer-search
+    searchTerm=(readonly searchTerm)
+    onSearch=(action "performSearch")
+  }}
   {{#if emptyTopics}}
     <span class="no-topics-found">{{i18n 'knowledge_explorer.no_topics'}}</span>
   {{else}}
-    {{knowledge-explorer-search
-      searchTerm=(readonly searchTerm)
-      onSearch=(action "performSearch")
-    }}
     {{#conditional-loading-spinner condition=isLoading}}
       <div class="knowledge-explorer-browse">
         {{#if site.mobileView}}