Overflow and mrpack fixes, comfortable memory slider and more. (#762)

* Add overflow rules for certain elements.

* Round scrollbar corners to be more attractive.

* Avoid corners in avatar & fix white corner in logs

* Increase step to 64 for memory related inputs.

* Fix overflow on title in mod browse. Fixes #740

* Fix overflow in instance mod browsing.

* Add checks for instances without versions.

theseus_gui/src/pages/Browse.vue

@@ -549,7 +549,11 @@ onUnmounted(() => unlistenOffline())
             size="sm"
           />
           <div class="small-instance_info">
-            <span class="title">{{ instanceContext.metadata.name }}</span>
+            <span class="title">{{
+              instanceContext.metadata.name.length > 20
+                ? instanceContext.metadata.name.substring(0, 20) + '...'
+                : instanceContext.metadata.name
+            }}</span>
             <span>
               {{
                 instanceContext.metadata.loader.charAt(0).toUpperCase() +