Fix some conditions which caused dropdown to hide all results

RELEASE-NOTES.md

@@ -21,6 +21,8 @@
 **Bugs**
 - **Divider/Step/Modal/AD** - Fixes 1px jump at `@mobileBreakpoint` caused by incorrect edge conditions in media query #3180 **THanks @mdehoog**
 - **Dimmer** - Dimmer can now works correctly with `opacity: 0` #3167 **Thanks @mdehoog**
+- **Dropdown** - Fixed condition where focusing on dropdown would show a blank menu when "no results" was reached and the dropdown was refocused
+- **Dropdown** - Search dropdowns will now correctly filter by current search term on re-focus
 - **Dropdown** - Fixed issue where tabindex was being removed incorrectly with `selection dropdown` in some cases. #3002
 - **Dropdown** - Added `remoteValues` as a possible `field` setting. Allowing users to return API results using arbitrary JSON object groupings. #3080
 - **Dropdown** - Added ability to pass in `keys` as a setting, to avoid issues with languages where comma delimiter may be a different keycode #3016

src/definitions/modules/dropdown.js

@@ -413,7 +413,7 @@ $.fn.dropdown = function(parameters) {
             if(module.is.multiple() && !module.has.search() && module.is.allFiltered()) {
               return true;
             }
-            if(module.has.message() && !module.has.maxSelections()) {
+            if(module.has.message() && !(module.has.maxSelections() || module.has.allResultsFiltered()) ) {
               module.remove.message();
             }
             if(settings.onShow.call(element) !== false) {
@@ -791,13 +791,17 @@ $.fn.dropdown = function(parameters) {
               : $activeItem,
             hasSelected = ($selectedItem.size() > 0)
           ;
-          if( hasSelected && module.has.query() ) {
-            module.debug('Forcing partial selection to selected item', $selectedItem);
-            module.event.item.click.call($selectedItem);
-          }
-          else {
-            module.hide();
+          if( module.has.query() ) {
+            if(hasSelected) {
+              module.debug('Forcing partial selection to selected item', $selectedItem);
+              module.event.item.click.call($selectedItem);
+              return;
+            }
+            else {
+              module.remove.searchTerm();
+            }
           }
+          module.hide();
         },
 
         event: {
@@ -842,6 +846,7 @@ $.fn.dropdown = function(parameters) {
                 module.remove.activeLabel();
               }
               if(settings.showOnFocus) {
+                module.search();
                 module.show();
               }
             },