vertical ellispsis instead

src/popup.html

@@ -30,7 +30,7 @@
         <div class="dropdown-menu-capture"></div>
         <button id="mtxSwitch_matrix-off" type="button" class="fa scopeRel tip-anchor-left" data-i18n-tip="matrixMtxButtonTip">&#xf011;<span class="badge"></span></button>
         <div style="display: inline-block; position: relative">
-            <button id="buttonMtxSwitches" type="button" class="dropdown-menu-button fa scopeRel" tabindex="-1">&#xf141;</button>
+            <button id="buttonMtxSwitches" type="button" class="dropdown-menu-button fa scopeRel" tabindex="-1">&#xf142;</button>
             <div class="dropdown-menu">
                 <ul id="mtxSwitches">
                     <li id="mtxSwitch_ua-spoof" class="dropdown-menu-entry"><span data-i18n="matrixSwitchUASpoof"></span>