refactor(task-list): improve layout and styling for better usability

- Removed unnecessary padding from task filters for a cleaner look.
- Adjusted height calculations to optimize space usage in the task list.
- Added padding to the content area to ensure the horizontal scrollbar is visible.
- Updated subtask count checks for clarity and consistency.
- Modified gap and margin values in project view header for improved alignment.

worklenz-frontend/src/pages/projects/projectView/project-view.tsx

@@ -344,14 +344,14 @@ const ProjectView = React.memo(() => {
   // Show loading state while project is being fetched
   if (projectLoading || !isInitialized) {
     return (
-      <div style={{ marginBlockStart: 80, marginBlockEnd: 16, minHeight: '80vh' }}>
+      <div style={{ marginBlockStart: 70, marginBlockEnd: 12, minHeight: '80vh' }}>
         <SuspenseFallback />
       </div>
     );
   }
 
   return (
-    <div style={{ marginBlockStart: 80, marginBlockEnd: 16, minHeight: '80vh' }}>
+    <div style={{ marginBlockStart: 70, marginBlockEnd: 12, minHeight: '80vh' }}>
       <ProjectViewHeader />
 
       <Tabs