Leaves Topic - UI + Functional Issues

[SinghPrakash0206]

DES:
There are a couple of UI + Functional issues in the Leaves.Topic as described below:

1. The footer overlaps with the reader panel
2. The Page list (at the end) overlaps with the reader panel
3. When a user searches for another topic, the list of previously opened items in reader panel is lost. The user only sees the new page opened from the recent topic.
4. The header label format should be phrased in a better way
   Current: (topic selected by use) topics
   Expected: Topic selected: (topic selected by user)
   a. This will be easier to expand when we allow users to select multiple topics at a time. For example:
   

Issue video: https://www.screenmailer.com/v/NGWqAEoyaqLgBfE

AC:

1. The footer section should not overlap the reader panel
2. The page lists section should not overlap the reader panel. It should be at the end of the page just above the footer section.
3. All the pages opened by a user should be saved even after the user searches for another topic.