Merge pull request #60 from COMP231-S63G1/updateForIteration1

fix back button of register page and toast in login page
Layout and design o create group form
Design and layout of create group form #61 #68
Merge pull request #119 from COMP231-S63G1/CreateGroupForm

Create group form
Search group form layout and design #70 #76
Merge pull request #120 from COMP231-S63G1/searchGroups

Search group form layout and design #70 #76
try merge with master