typo and add missing title

src/app/files/file-explorer.js

@@ -287,7 +287,7 @@ function fileExplorer (localRegistry, files, menuItems) {
       var isFolder = label.className.indexOf('folder') !== -1
       var save = textUnderEdit !== label.innerText
       if (save) {
-        modalDialogCustom.confirm('Confirm to rename a file', 'Are you sure you want to rename thi file?', () => { rename() }, () => { label.innerText = textUnderEdit })
+        modalDialogCustom.confirm('Confirm to rename a file', 'Are you sure you want to rename this file?', () => { rename() }, () => { label.innerText = textUnderEdit })
       }
       label.removeAttribute('contenteditable')
       label.classList.remove('bg-light')
@@ -357,7 +357,7 @@ fileExplorer.prototype.uploadFile = function (event) {
       if (!exist) {
         loadFile()
       } else {
-        modalDialogCustom.confirm('Confirm to overrite', `The file ${name} already exists! Would you like to overwrite it?`, () => { loadFile() })
+        modalDialogCustom.confirm('Confirm overwrite', `The file ${name} already exists! Would you like to overwrite it?`, () => { loadFile() })
       }
     })
   })
@@ -450,7 +450,7 @@ fileExplorer.prototype.packageFiles = function (filesProvider, callback) {
 fileExplorer.prototype.copyFiles = function () {
   let self = this
   modalDialogCustom.prompt(
-    null,
+    'Copy files from browser explorer',
     'To which other remix-ide instance do you want to copy over all files?',
     'https://remix.ethereum.org',
     (target) => {

src/app/tabs/runTab/contractDropdown.js

@@ -141,7 +141,7 @@ class ContractDropdownUI {
     }
 
     var promptCb = (okCb, cancelCb) => {
-      modalDialogCustom.promptPassphrase(null, 'Personal mode is enabled. Please provide passphrase of account', '', okCb, cancelCb)
+      modalDialogCustom.promptPassphrase('Passphrase requested', 'Personal mode is enabled. Please provide passphrase of account', '', okCb, cancelCb)
     }
 
     var statusCb = (msg) => {

src/app/tabs/runTab/recorder.js

@@ -56,7 +56,7 @@ class RecorderUI {
     }
 
     var promptCb = (okCb, cancelCb) => {
-      modalDialogCustom.promptPassphrase(null, 'Personal mode is enabled. Please provide passphrase of account', '', okCb, cancelCb)
+      modalDialogCustom.promptPassphrase('Passphrase requested', 'Personal mode is enabled. Please provide passphrase of account', '', okCb, cancelCb)
     }
 
     var alertCb = (msg) => {
@@ -76,7 +76,7 @@ class RecorderUI {
   triggerRecordButton () {
     this.recorder.saveScenario(
       (path, cb) => {
-        modalDialogCustom.prompt(null, 'Transactions will be saved in a file under ' + path, 'scenario.json', cb)
+        modalDialogCustom.prompt('Save transactions as scenario', 'Transactions will be saved in a file under ' + path, 'scenario.json', cb)
       },
       (error) => {
         if (error) return modalDialogCustom.alert(error)

src/app/tabs/runTab/settings.js

@@ -170,8 +170,8 @@ class SettingsUI {
     selectExEnv.addEventListener('change', (event) => {
       let context = selectExEnv.options[selectExEnv.selectedIndex].value
       this.settings.changeExecutionContext(context, () => {
-        modalDialogCustom.confirm(null, 'Are you sure you want to connect to an ethereum node?', () => {
-          modalDialogCustom.prompt(null, 'Web3 Provider Endpoint', 'http://localhost:8545', (target) => {
+        modalDialogCustom.confirm('External node request', 'Are you sure you want to connect to an ethereum node?', () => {
+          modalDialogCustom.prompt('External node request', 'Web3 Provider Endpoint', 'http://localhost:8545', (target) => {
             this.settings.setProviderFromEndpoint(target, context, (alertMsg) => {
               if (alertMsg) {
                 modalDialogCustom.alert(alertMsg)

src/lib/gist-handler.js

@@ -12,7 +12,7 @@ function GistHandler (_window) {
     var gistId
     if (params['gist'] === '') {
       loadingFromGist = true
-      modalDialogCustom.prompt(null, 'Enter the ID of the Gist or URL you would like to load.', null, (target) => {
+      modalDialogCustom.prompt('Load a Gist', 'Enter the ID of the Gist or URL you would like to load.', null, (target) => {
         if (target !== '') {
           gistId = getGistId(target)
           if (gistId) {

src/universal-dapp-ui.js

@@ -229,7 +229,7 @@ UniversalDAppUI.prototype.getCallButton = function (args) {
     }
 
     var promptCb = (okCb, cancelCb) => {
-      modalCustom.promptPassphrase(null, 'Personal mode is enabled. Please provide passphrase of account', '', okCb, cancelCb)
+      modalCustom.promptPassphrase('Passphrase requested', 'Personal mode is enabled. Please provide passphrase of account', '', okCb, cancelCb)
     }
 
     // contractsDetails is used to resolve libraries