Update "Build a dApp in 15 minutes" page - grammar, removed redundant…

… text, updated diagrams

docs/developers/tutorials/your-first-dapp.md

@@ -38,23 +38,23 @@ Other rules:
 
 For the web app we'll have two pages:
 
-- The _Sign in_ page - here we can authenticate with ledger, web wallet or with Maiar Wallet
+- The _Sign in_ page - here we can authenticate with ledger, web wallet or with xPortal app
 - The _Dashboard_ page - here we can either ping or pong, if we already deposited, then we will see a countdown timer until the time interval clears out.
 
 [comment]: # (mx-context-auto)
 
 ### **Blockchain Layer (The Backend)**
 
 We will create a smart contract that can handle the deposit (`ping`), claim (`pong`) and status actions (`did_user_ping`, `get_time_to_pong`).
-Let's say that, for now, this smart contract plays the role of an API in a dApp. Also this is where our business logic resides.
+Let's say that, for now, this smart contract plays the role of an API in a dApp. Also, this is where our business logic resides.
 
 The MultiversX _devnet_ is a public test network maintained by our community where any developer can test their smart contracts and dApps in a real world environment.
 
 [comment]: # (mx-context-auto)
 
 ## **Set up the environment**
 
-Let's set up the evironment for getting your first dapp up and running.
+Let's set up the environment for getting your first dapp up and running.
 
 [comment]: # (mx-context-auto)
 
@@ -112,8 +112,6 @@ git clone https://github.com/multiversx/mx-ping-pong-sc contract
 
 We now have the source code for the smart contract, but we need to compile it into a _binary_ that the MultiversX Virtual Machine can run. The VM can run Web Assembly code, so we need to compile our Rust source code into Web Assembly (WASM).
 
-We now have the source code for the smart contract, but we need to compile it into a _binary_ that the MultiversX (previously Elrond) Virtual Machine can run. The VM can run Web Assembly code, so we need to compile our Rust source code into Web Assembly (WASM).
-
 Run the following command in order to build the rust smart contract into a _wasm file_.
 
 ```sh

pull_request_template.md

@@ -1,5 +1,3 @@
-<!-- For external contributors: Make sure that you are on a new branch that started from the `external` branch. -->
-
 #### Description of the pull request (what is new / what has changed)
 
 #### Did you test the changes locally ?