Merge pull request #3372 from matrix-org/bwindels/fix-command-tab-complete

New composer: fix tab-complete in commands

src/editor/autocomplete.js

@@ -40,6 +40,11 @@ export default class AutocompleteWrapperModel {
         return this._getAutocompleterComponent().hasSelection();
     }
 
+    hasCompletions() {
+        const ac = this._getAutocompleterComponent();
+        return ac && ac.countCompletions() > 0;
+    }
+
     onEnter() {
         this._updateCallback({close: true});
     }

src/editor/parts.js

@@ -465,10 +465,6 @@ export class CommandPartCreator extends PartCreator {
 }
 
 class CommandPart extends PillCandidatePart {
-    acceptsInsertion(chr, i) {
-        return PlainPart.prototype.acceptsInsertion.call(this, chr, i);
-    }
-
     get type() {
         return "command";
     }