Implemented Hero Animations

[Deepanshu-Rohilla]

Some points to note about this change:

1. While clicking on the group, the animations sometimes create a laggy effect. However, it is nice while reverting back to dashboard.
2. The loading after clicking on the group card sometimes reduces the laggy effect.
3. I have implemented only on dashboard to know the effects on UI. If everything goes right, we can implement it in other areas also (for example, in opening chat of any group)
   

[tmibvishal]

That is because on the next screen the document where Hero class is applied is visible only after loading. Make sure atleast the name of group is passed from main screen and then there on second screen all the time (even during loading phase). Apply Hero class on that

[Deepanshu-Rohilla]

1. Removed the loading circular animation which was causing the laggy effect.
2. Implemented the sliver app.
3. Removed the scrolling issue that came up today.
4. Modified the button in the bottom (text was not clearly visible)
   
   
   

[tmibvishal]

No it's still not working. The title appears late after black screen thus no animation.
Have app bar always appear (pass title value from one screen to another so you always have title value) and loading icon below the app bar.

[Deepanshu-Rohilla]

1. Fixed the loading issue. Earlier, the card was also inside future builder which was not necessary. Now, the card details are taken from the card in tripslist.dart and it is shown in the group screen.
   This eventually fixed the lagging issue. Only the details of member are shown after loading.
   .

[tmibvishal]

Fix the formatting. Hard wrap is not set to 900

[tmibvishal]

also here

[tmibvishal]

Btw can you explore, why on clicking the back button there is no animation ? Genrally in Hero class there is animation both on opening the page and closing the page

[Deepanshu-Rohilla]

Previous GIF had only opening animations. This one has both the animations (opening and closing)

[tmibvishal]

Formatting is still not fixed. Make the hard wrap to 900

[Deepanshu-Rohilla]

Fixes #89