Add some missing tooltips

https://forums.ankiweb.net/t/two-editor-buttons-do-not-have-tooltips/30203

ftl/core/editing.ftl

@@ -67,6 +67,8 @@ editing-mathjax-preview = MathJax Preview
 editing-shrink-images = Shrink Images
 editing-close-html-tags = Auto-close HTML tags
 editing-from-clipboard = From Clipboard
+editing-alignment = Alignment
+editing-equations = Equations
 
 ## You don't need to translate these strings, as they will be replaced with different ones soon.
 

ts/editor/editor-toolbar/BlockButtons.svelte

@@ -110,6 +110,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
             >
                 <span class="block-buttons" use:asReference>
                     <IconButton
+                        tooltip={tr.editingAlignment()}
                         {disabled}
                         on:click={() => (showFloating = !showFloating)}
                     >

ts/editor/editor-toolbar/LatexButton.svelte

@@ -89,6 +89,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 >
     <IconButton
         slot="reference"
+        tooltip={tr.editingEquations()}
         {disabled}
         on:click={() => (showFloating = !showFloating)}
     >